Proceedings of the International Conference on

Materials and Mechanisms of SuperconductivityHigh Temperature Superconductors II

Parti

Stanford University, California, USA, July 23-28, 1989

Editors:

Robert N. SheltonUniversity of CaliforniaDavis, California

Walter A. HarrisonStanford UniversityStanford, California

Norman E. PhillipsLawrence Berkeley Laboratory and University of CaliforniaBerkeley, California

,1989

JORTH-HOLLAND UNIVERSITATSniBLIOTHEKHANiJ

TECHr

OVER

iSCHEir-JFORMATiONG3IBLIOTHEK

%

CONTENTS

PrefaceIntroductory remarksConference summaryList of committeesAcknowl edgements

vnixxixv

xvi

PARTI

Al. Plenary papers (Monday, 24 July 1989)

ALL High-Tc materials

Crystal chemistry of oxide superconductorsA.W. Sleight

A 1.2. Physical properties ofhigh-Tc superconductors

Properties and parameters of the superconducting oxidesG. Griiner

Harmless survey of the theoretical situation in the high temperature superconductivityL.P. Gor'kov 12

A2. Combined papers (Monday, 24 July 1989)

A2.1. Thin film synthesis - Chemistry/property relations

Field-modulated microwave absorption study of Pb-modified Bi-Ca-Sr-Cu-OW.-F. Yau, R. Ramesh, A.M. Portis, E.R. Weber, G. Thomas, S.M. Green and H.L. Luo

Effect of the oxygen distribution on high Tc superconductivityY. Bruynseraede, J.-P. Locquet, J. Vanacken, B. Wuyts, C. van Haesendonck and I.K. Schuller

Substitutions of 3-d transition metal ions for copper in Bi2Sr2Can_1CunO2n+4T.E. Jones, P.M. Thibado, W.C. McGinnis, R.D. Boss, J.W. Schindler and S. Oseroff

Synthesis and superconducting properties of (Bi, Pb)-Sr-Ca-Cu-O systemN. Kobayashi, H. Kawabe, K. Kusaba, M. Kiuchi, Y. Syono and Y. Muto

Structure and properties of a metallic, cubic thallium-doped barium cuprateZ. Iqbal, B.L. Ramakrishna, F. Reidinger, H. Eckhardt and J.C. Barry

Magnetic and superconducting properties of Fe-substituted (La, Sr)2CuO4_<s

M. Reissner, W. Steiner, K. Remschnig, P. Rogl and E. Gratz

21

23

25

27

29

31

xviii Contents

Magnetic ordering in YBa2Cu3Ox studied by fi+ spin rotationJ.H. Brewer, J.F. Carolan, W.N. Hardy, H. Hart, R. Kadono, J.R. Kempton, R.F. Kiefl,S.R. Kreitzman, G.M. Luke, T.M. Riseman, P.W. Schleger, B.J. Sternlieb, Y.J. Uemura,D.LI. Williams and B.X. Yang 33

Effect of Mg addition on superconducting properties of Bi-Sr-Ca-Cu-O compoundsR.J. Lin, S.W. Lu and P.T. Wu 35

Effect of oxygen annealing on single crystals of YBa2 (Cu! -xFex)iO7_y Mossbauer spectroscopyI.V. Zubov, A.S. Ilyushin, R.N. Kuz'min, V.S. Moisa, A.A. Novakova and A.A. Bush 37

A new series of (Tl1_i,Biy)(Ca1_^Y^.)Sr2Cu2Oz superconductors with "1122" structureY.T. Huang, R.S. Liu, W.N. Wang and P.T. Wu 39

On inhomogeneous superconductivity in Fe substituted YBa2Cu307_,5M. Carrera, X. Granados, M.A. Crusellas, J. Fontcuberta, X. Obradors, J.L. Garcia-Mufioz,J. Rodriguez, M. Vallet, J.M. Gonzalez-Calbet, C. Rillo and F. Lera 41

A magnetic study of Y1_ArR^Ba2Cu3O7_^ ceramic superconductors with R = Dy and ErR. Job, M. Rosenberg and K. Nahm 43

Structure of Fe-doped Y ^ a ^ ^ O ^ and Bi2Sr2CaiCu2Oj,O. Bremert, C. Michaelsen and H.-U. Krebs 45

Effects of substitution in different atomic sites in superconducting YBa2Cu3O7

Y. Zhao, H. Zhang and Q. Zhang 47Superconducting properties in relation to chemical pressure in YBa2Cu3O9_,5

H. Fjellvag, P. Karen, A. Kjekshus and A.F. Andresen 49Cobalt clusters in substituted YBa2(Cu1_J/Co>,)3O6+x

H. Renevier, J.L. Hodeau, P. Bordet, J.J. Capponi, M. Marezio, F. Baudelet, H. Tolentino,G. Tourillon, E. Dartige, A. Fontaine, J.C. Martinez and J.J. Prejean 51

Structural changes and oxygen stoichiometry in Pb2Sr2Yi_JCCaArCu3O8+i

J.J. Capponi, P. Bordet, C. Chaillout, J. Chenavas, O. Chmaissem, E.A. Hewat, J.L. Hodeau,W. Korczak and M. Marezio 53

Oxygen diffusion in Ba2YCu307_^ investigated by thermogravimetric relaxation techniqueK. Kishio, K. Kitazawa, K. Suzuki, T. Hasegawa and K. Fueki 55

Structural aspects of the phase separation in La2CuO4032C. Chaillout, J. Chenavas, S.-W. Cheong, Z. Fisk, M.S. Lehmann, M. Marezio, B. Morosinand J.E. Schirber 57

Oxygen content and structural properties of some Ba-Cu oxidesS.G. Eriksson, L.-G. Johansson, L. Bjorjesson and M. Kakihana 59

Praseodymium 1-2-3: intrinsic structure, oxygen concentration effects and solid solutions withyttrium, calcium and zincM.E. Lopez-Morales, A. Bezinge, P.M. Grant and D. Rios-Jara 61

Hole concentration, Hall number and disorder in compensation doped NdBa2Cu3O>,T. Penney, M.W. Shafer and B.L. Olson 63

Hydrogen intercalation in some superconducting copper oxidesT. Takabatake, W. Ye, S. Orimo, T. Tamegai and H. Fujii 65

Superconducting properties and phonon spectra of Bi2Sr2Y|_xCa^Cu2Oy

R. Yoshizaki, H. Ikeda, Y. Saito and Y. Abe 67Chemical probes of Tc vs p in p-type copper-oxide superconductors

A. Manthiram and J.B. Goodenough 69

Contents xix

Formation of YBa2BiO6 and its effect on the superconductivity in Bi replaced YBa2Cu3Oy

N. Yang, R.S. Liu, W.N. Wang, Y.H. Chao, H.C. Lin and P.T. Wu 71Investigations on oxygen content and ordering in Yr(Ba, Sr)2(Cu, Co)3O7_d superconductors

by means of wet chemical analysis, X-ray- and neutron diffraction techniquesS.G. Eriksson, L.-G. Johansson, L. Borjesson and M. Kakihana 73

Ion microprobe characterization of E-beam deposited YBaCu(F)O films: effects of post-de-position processingJ.M. Chabala, R.P.R. Chang, J.B. Ketterson, R. Levi-Setti, D.X. Li, Y.L. Wang and X.K. Wang 75

Structural change induced in Kr irradiated RBaCuO ceramics (R = Gd, Ho)M.-O. Ruault, M. Barrachin, J. Lesueur, L. Dumoulin, H. Bernas, M. Gasgnier, J.C. Levet,H. Noel, R. Gougeon and M. Potel 77

Superconductivity and the structure of YBa2Cu3O6 ceramics and single crystals treated in hal-ogen vapoursYu.A. Ossipyan and O.V. Zharikov 79

Critical oxygen partial pressure for the "in-situ" preparation of high Tc superconducting thinfilmsR. Bormann and J. Nolting 81

Effects of oxygen stoichiometry and ordering in Ba2YCu3Oy ( 6<y<7)Y. Nakazawa and M. Ishikawa 83

The effect of lead additon to the Bi-Cu HTSC: phase separationM.A. Senaris-Rodriguez, F. Garcia-Alvarado, E. Moran, M.A. Alario-Franco, M.A. Gonzalez,J.L. Vicent and J. Ibaflez 85

Superconductivity in the Re,_^Cd^Ba2Cu3O7_rf (RE = Y, Nd, Sm, Gd, Dy, Ho, Yb) systemsJ.W. Chen, T.C. Chang and C.F. Chen 87

Superconductivity and magnetic scattering in the Nd2_^Ce^CuO4_,5 compoundsJ.L. Peng, R.N. Shelton and H.B. Radousky 89

Effect of electron and volume change via SB(V) doping on the superconducting behavior of

B. Dabrowski, D.R. Richards, D.G. Hinks, R.H. Hannon, H. Lee, V.J. Melim, W. Peng andC.W. Kimball 91

Symmetry breaking oxygen displacements in superconducting oxidesT. Egami, B.H. Toby, W. Dmowski, S. Billinge, P.K. Davies, J.D. Jorgensen,M.A. Subramanian and A.W. Sleight 93

Chemistry and superconducting behavior of Sb-substituted Bi/Pb-based oxidesC.W. Kimball, W. Peng, R.H. Hannon, H. Lee, A.P. Genis, V.J. Melim, B. Dabrowski,D.R. Richards and D.G. Hinks 95

Varied oxygen stoichiometry in RBa2Cu307_^B.W. Veal, A.P. Paulikas, J.W. Downey, H. Claus, K.G. Vandervoort, G. Tomlins, H. Shi,M. Jensen and L. Morss 97

La2CuO4+(5 and La2NiO4+(!: phase separation resulting from excess oxygen defectsB. Dabrowski, J.D. Jorgensen, D.G. Hinks, S. Pei, D.R. Richards, H.B. Vanfleet andD.L. Decker 99

Ordering in Tl2CaBa2Cu208 and Tl2Ba2CuO6 studied by pair distribution function and RietveldanalysisB.H. Toby, W. Dmowski, T. Egami, J.D. Jorgensen, M.A. Subramanian, J. Gopalakrishnan,A.W. Sleight and J.B. Parise 101

xx Contents

The effect of oxygen stoichiometry on the superconducting properties of YBa2Cu3O7_(S near thetransition temperatureM. Slaski, T. Laegreid, O.-M. Nes, S. Gjelmesli, P. Tuset, K. Fossheim and Z. Bukowski 103

Transport critical current and morphology for Y-Ba-Cu-O films prepared by chemical vapordepositionY. Muto, K. Watanabe, N. Kobayashi, H. Kawabe, H. Yamane, H. Kurosawa and T. Hirai 105

Magnetic measurements on coevaporated YBa2Cu3O7 thin filmsP. Norling, K. Niskanen, P. Svedlindh, P. Nordblad, L. Lundgren, J. Hudner, H. Ohlsen andL. Stolt 107

Preparation of thallium superconductors by solid state and "sol-gel" methods and theircharacterizationW. Reith, C. Allgeier, K. Andres, J. Heise, R. Hoben, A.-K. Klehe, R. Kleiner, C. Kowal,A. Moise, P. Miiller and J.S. Schilling 109

Electrophoretic deposition of highly textured YBa2Cu307_x thick filmsM. Hein, E. Mahner, G. Muller, H. Piel, L. Ponto, M. Becks, U. Klein and M. Peiniger 111

A sol-gel route to prepare Tl-Ca-Ba-Cu-O superconductor with Tc above 120 KR.S. Liu, W.N. Wang, P.T. Wu and C.T. Chang 113

Zero resistivity at 81 K in BSCCO films grown from liquid KC1 solutionsG. Balestrino, R. Di Leo, M. Marinelli, E. Milani, A. Paoletti and P. Paroli 115

The growth and characterization of Bi-Pb-Sr-Ca-Cu-O films on single crystal substrate by spraypyrolysis and RF magnetron sputteringJ.J. Chu, M.R. Tseng, F.J. Shieh and P.T. Wu 117

In-situ preparation of c-axis oriented Y-Ba-Cu-O and Bi-Sr-Ca-Cu-O films on Si-substratesby laser ablationH.-U. Krebs and M. Kehlenbeck 119

YBCO films on YSZ and A12O3 by pulsed laser depositionD.K. Fork, K. Char, F. Bridges, S. Tahara, B. Lairson, J.B. Boyce, G.A.N. Connell andT.H. Geballe 121

Fast one step preparation of high quality YBa2Cu3O7_x thin films by laser ablationJ. Frohlingsdorf, P. Leiderer, R. Feile, W. Zander and B. Stritzker 123

Parameter study of in-situ grown superconducting YBaCuO thin films prepared by laser ablationD.H.A. Blank, D.J. Adelerhof, J. Flokstra and H. Rogalla 125

Anisotropic electrical properties of epitaxial YBa2Cu3O7_^ films on (110) SrTiO3

A. Gupta, G. Koren, R.J. Baseman, A. Segmiiller and W. Holber 127Pulsed laser deposition of YBa2Cu3O7_^ in an oxygen background and discharge

D.B. Chrisey, K.S. Grabowski and M.S. Osofsky 129Magnetic study of superconductivity in YBa2Cu3O7_x thin films

T.R. McGuire, A. Gupta, G. Koren, R.B. Laibowitz and D. Dimos 131Superconducting Tl-Ca-Ba-Cu-O thin films prepared by diffusion of Tl into an excimer laser

ablated Ca2Ba2Cu3O^ filmJ. Betz, H. Lengfellner, E. Duschl, K. Meidenbauer and K.F. Renk 133

Superconducting properties and irradiation induced effects of epitaxial YBaCuO thin filmsB. Roas, B. Hensel, G. Endres, L. Schultz, S. Klaumunzer and G. Saemann-Ischenko 135

A new route for the deposition of YBaCuO thin filmsM. Langlet, E. Senet, J.L. Deschanvres, F. Weiss, J.C. Joubert, O. Thomas and J.P. Senateur 137

Contents xxi

Transport and magnetic properties of plasma sprayed YBaCuO and BiSrCaCuOR. Suryanarayanan, A.M. Bouanani, G. Brun, G.T. Bhandage and O. Gorochov 139

Deposition and characterization of Y-Ba-Cu-O thin films on silicon substrates: interface analysisD.B. Fenner, D.K. Fork, J.B. Boyce, G.A.N. Connell and A.M. Viano 141

An electrochemical method for the determination of the chemical diffusion coefficient of oxygenin Y1Ba2Cu3O7_J. as a function of vacancy concentrationJ. MacManus, D. Fray and J. Evetts 143

A2.2. Magnetic spin resonance- Theory (Phenomenology)

The /zSR-investigation of the magnetic and superconducting properties of the compoundL S A OV.G. Grebinnik, V.N. Duginov, V.A. Zhukov, S. Kapusta, A.B. Lazarev, V.G. Olshevsky,V.Yu. Pomjakushin, S.N. Shilov, I.I. Gurevich, B.F. Kirillov, B.A. Nikolsky, A.V. Pirogov,A.N. Ponorarev, V.A. Suetin, A.G. Peresada, M.D. Nersesyan, I.P. Borovinskaya,V.R. Karasik, O.E. Omelyanovsky and T.G. Togonidze 145

Superconductivity and magnetism of La2CuO4+<i by /iSRE.J. Ansaldo, J.H. Brewer, T.M. Riseman, J.E. Schirber, E.L. Venturini, B. Morosin,D.S. Ginley and B.J. Sternlieb 147

Dependence of the magnetic ordering in YBaaCusO^H^ on the oxygen and hydrogenconcentrationH. Gliickler, A. Weidinger, A. Golnik, C. Niedermayer, M. Rauer, R. Simon, E. Recknagel,J.I. Budnick, W. Paulus and R. Schollhorn 149

Measurement of the London penetration depths in YBa2Cu3Ox by means of muon spin rotation(,uSR) experimentsB. Piimpin, H. Keller, W. Kundig, W. Odermatt, I.M. Savic, J.W. Schneider, H. Simmler,P. Zimmermann, J.G. Bednorz, Y. Maeno, K.A. Miiller, C. Rossel, E. Kaldis, S. Rusiecki,W. Assmus and J. Kowalewski 151

/z+SR evidence for strong exchange interactions in ErBa2Cu3O^P. Birrer, F.N. Gygax, B. Hitti, E. Lippelt, H. Maletta, A. Schenck and M. Weber 153

fiSR study of the magnetic phase diagram of Bi2Sr2Yi_;>.CaJ(.Cu2O8+(5R. De Renzi, C. Bucci, P. Carretta, G. Guidi, R. Tedeschi, G. Calestani and S.F.J. Cox 155

Coexistence of superconductivity and magnetic order in YBa2Cu3O^J.H. Brewer, J.F. Carolan, W.N. Hardy, B.X. Yang, P.W. Schleger, R. Kadono, J.R. Kempton,R.F. Kiefl, S.R. Kreitzman, G.M. Luke, T.M. Riseman, D.LI. Williams, K. Chow, P. Dosanjh,B. Gowe, R. Krahn and M. Norman 157

Magnetic correlations in superconducting YBa2Cu3O66 ( r c = 40 K) observed by muon spinrotationC. Niedermayer, A. Golnik, H. Gliickler, M. Rauer, R. Simon, E. Recknagel, A. Weidinger,J.I. Budnick, H. Eickenbusch, W. Paulus and R. Schollhorn 159

/iSR study of magnetism in La1.85Sro.15Cu04 and YBa2Cu3Ox below 90 mKR.F. Kiefl, E.J. Ansaldo, J.H. Brewer, J.F. Carolan, P. Dosanjh, W.N. Hardy, R. Kadono,J.R. Kempton, W.J. Kossler, R. Krahn, S.R. Kreitzman, G.M. Luke, P.W. Schleger,C.L. Seaman, B.J. Sternlieb, H. Takagi, S. Uchida, Y.J. Uemura, B.X. Yang, X.H. Yu andH.Zhou 161

xxii Contents

Nuclear quadrupole resonance studies in Ga-doped YBa2(Cu1_^Ga^)3O7_<5 (<5=O.O5)A.K. Rajarajan, L.C. Gupta, R. Vijayaraghavan and N.C. Misra 163

Cu NQR of (Y,_yCa^)Ba2Cu3O6

A.J. Vega, M.K. Crawford, E.M. McCarron and W.E. Farneth 165

Antiferromagnetism in YBa2Cu3O6+^ studied by "Cu and 89Y NMRP. Mendels, H. Alloul, T. Ohno, G. Collin and J.F. Marucco 167

Cu spin dynamics in high Tc and related oxides investigated by nuclear spin-lattice relaxationT. Imai, H. Yasuoka, T. Shimizu, Y. Ueda, K. Yoshimura and K. Kosuge 169

Linewidth of Cu NQR signals in YBa2Cu3O7_,5 and oxygen defect distributionH. Schiefer, M. Mali, J. Roos, H. Zimmermann, D. Brinkmann, S. Rusiecki and E. Kaldis 171

Pressure effects of NQR parameters in YBa2Cu3Oy

K. Miiller, M. Mali, J. Roos and D. Brinkmann 173

Anomalous temperature dependence of Cu NMR line width and magnetization in YBa2Cu3O7_a

M. Takigawa, P.C. Hammel, R.H. Heffner, Z. Fisk, J.D. Thompson and M.P. Maley 175

Nuclear relaxation rates at copper and oxygen sites in YBa2Cu3O7

P.C. Hammel, M. Takigawa, R.H. Heffner, Z. Fisk and K.C. Ott 177

Nuclear relaxation and Cu spin dynamics in YBa2Cu3O6+x

W.W. Warren Jr., R.E. Walstedt, G.F. Brennert, R.F. Bell, G.P. Espinosa and R.J. Cava 179

Cu-NMR of the antiferromagnetic and superconducting Nd2_xCexCuO4_y

K.i. Kumagai, M. Abe, S. Awaji and T. Fujita 181

Cu-AFNR and NQR of the antiferromagnetic and superconducting Bi2Sr2(Ca1_^Y^)Cu2O8+J,K.i. Kumagai, T. Oashi, H. Nakajima, T. Tomita and T. Fujita 183

Magnetic order at Cu sites in superconducting YBa2(Cui_xFeA:)3O7

Y. Nakamichi, K.i. Kumagai, H. Nakajima and T. Fujita 185

Cu-NQR study on the antiferromagnetism and superconductivity in La2_xSr,.CuO4

Y. Nakamura and K.i. Kumagai 187

NQR characterization of Bi2Sr2Can_!CunO4+2n materialsG. Guidi, C. Bucci, P. Carretta, R. De Renzi, R. Tedeschi, G. Calestani and C. Vignali 189

Spin dynamics in YBa2Cu3O7_,5 with 0.0<J<0.6 studied by 89Y-NMRJ.C. Jol, H.B. Brom, J. van den Berg, R.A. Zacher and M. Besselink 191

89Y NMR studies of the electronic properties of 123 compoundsH. Alloul, T. Ohno and P. Mendels 193

NMR study of l7O in high Tc superconducting oxidesY. Kitaoka, Y. Berthier, P. Butaud, M. Horvatic, P. Segransan, C. Berthier, H. Katayama-Yoshida, Y. Okabe and T. Takahashi 195

Distortion induced bi-polaron model for oxide superconductorsW.Y.Liang 197

Stability of antiferromagnetism in high Tc superconductorsD. Peter, D. Mayou and M. Cyrot 199

On the nature of isotope effect in the RVB models of superconductivityD.V. Fil', D.O. Livdan and O.I. Tokar' 201

Anisotropic superconductivity in high-!Tc layered crystalsS.S. Jha 203

Contents xxiii

Strong-coupling effects on K2(T) for high-Tc superconductors?J. Rammer and W. Pesch 205

Spin dynamics of cuprate superconductors: exact results from numerical continued fractionexpansionsC.-X. Chen and H.-B. Schuttler 207

Correlation between mxing of Cu d orbitals and Tc determined by polarized Cu L3 XAS: ex-perimental evidence for pairing mediated by d-d excitationsA. Bianconi, P. Castrucci, A. Fabrizi, M. Pompa, A.M. Flank, P. Lagarde, H. Katayama-Yoshida and G. Calestani 209

One hole spectra at YBa2Cu3O7 surfacesC. Calandra, F. Manghi and T. Minerva 211

On the linear temperature dependence of the Hall number in YBa2Cu3O7

X. Oudet 213Phase separation near the Mott transition in La2_xSr^.CuO4

R.S. Markiewicz 215A unified approach to the description of high Tc oxides: major normal and superconducting

parametersS.A. Wolf and V.Z. Kresin 217

Superconductivity and valence bondX. Oudet 219

Electronic states near the metal-insulator transition in oxide superconductorsH. Matsumoto, M. Sasaki and M. Tachiki 221

Oxygen vacancy ordering in YBa2Cu3O7_y

P.A. Sterne and L.T. Wille 223Monte Carlo simulation of oxygen ordering in YBa2Cu3O2

C.P. Burmester, M.E. Mann, G. Ceder, L.T. Wille and D. de Fontaine 225Superconducting glass state in the random infinite-range interaction extended Hubbard model

T.K. Kopec and P. Wrobel 227Dipole superconductive glass model in a Josephson medium

V.I. Aksenov, E.I. Kornilov and S.A. Sergeenkov 229Entangled fluxoid liquid state in high Tc superconductors

S.B.Nam 231Superconducting glassy state induced by twins

A.VI. Gurevich and R.G. Mints 233Flux lattice melting in the high-rc materials

R.S. Markiewicz 235Effect of thermal fluctuation on magnetic flux depinning and the crossover from flux creep to

flux flowM. Inui, P.B. Littlewood and S.N. Coppersmith 237

Flux pinning and creep in high-Tc superconductorsV. Geshkenbein, A. Larkin, M. Feigel'man and V. Vinokur 239

Intrinsic flux pinning in high Tc oxide superconductorsM. Tachiki and S. Takahashi 241

Pinning of two phases of high temperature superconductorsA.G. Saif 243

xxiv Contents

Influence of thermal phonons on a local-pair superconductivityD.I. Khomskii 245

Neutron scattering from fermion and boson superconductorsA.K. Rajagopal, W. Jin and S.D. Mahanti 247

Generalized Bose-gas condensation model for Tc in multi-dimensional superconductivityM. Rabinowitz 249

Possible explanation of the curvature in the upper critical field for ceramic and heavy-fermionsuperconductorsH.R. Brand, H. Pleiner and M.M. Doria 251

The Ln2Cu2O5 ESR study (Ln = Y, Tb-Lu)A.A. Gippius, V.V. Moshchalkov, Yu.A. Koksharov, A.N. Tikhonov, B.V. Mill andY. Zoubkova 253

NMR studies of new oxides in the Ba-Sc-Cu-0 systemA.A. Gippius, V.V. Moshchalkov, Yu.M. Petrusevich, O.P. Revokatov, E.V. Antipov andA.L. Kcharlanov 255

Magnetic field density of distorted vortex latticesE.H. Brandt 257

Magnetic penetration depth of Bi-Sr-Ca-Cu-OE.J. Ansaldo, B. Batlogg, R.J. Cava, D.R. Harshman, L.W. Rupp Jr., T.M. Riseman andD. Williams 259

Calculation of the nuclear quadrupole resonance spectra of YBa2Cu307_j:

N.W. Winter and C.E. Violet 261NMR of 17O and 63Cu in uniaxially aligned superconductor YBa2Cu3O7_,s

E. Lippmaa, E. Joon, I. Heinmaa, A. Miller, V. Miidel, R. Stern and S. Vija 263

NMR study of 6 3 "Cu in YBa2Cu3O7 to 6.65 single crystalsM. Horvatic, P. Segransan, Y. Berthier, P. Butaud, Y. Kitaoka, C. Berthier, J.Y. Henry andM. Couach 265

NQR and NMR study of Bi-(PB)-Sr-Ca-Cu-O ceramic superconductorsR. Michalak, M. Rosenberg and H. Lutgemeier 267

Unconventional superconductivity in heavy fermionic and high-Tc superconductorsG.E. Volovik 269

Superconductivity of fermi glassesB.K. Chakrabarti and D.K. Ray 271

Ginzburg-Landau calculations of the critical current densities of grain boundariesA.M. Campbell 273

Fluctuation contribution to flux-flow conductivityK. Maki and R.S. Thompson 275

Thermoelectric effects in high-temperature superconductorsV.L. Ginzburg 277

Contents xxv

A3. Invited papers (Monday, 24 July 1989)

A3.1. Materials chemistry of high-Tc superconductors

Oxygen stoichiometry and superconductivity in YBa2Cu3O6+x and Pb2Sr2Y,_A.Cax08+rfM. Marezio, P. Bordet, J.J. Capponi, R.J. Cava, C. Chaillout, J. Chenavas, A.W. Hewat,E.A. Hewat, J.L. Hodeau and P. Strobel 281

On the crystal growth and chemistry of the new electron-type superconducting oxidesJ.-M. Tarascon, E. Wang, L.H. Greene, R. Ramesh, B.G. Bagley, G.W. Hull, P.F. Miceli,Z.Z. Wang, D.A. Brawner and N.P. Ong 285

Disappearance of high temperature superconductivity induced by high carrier concentrationsJ.B. Torrance, A. Bezinge, A.I. Nazzal and S.S.P. Parkin 291

Magnetism, specific heat, and pressure-dependent resistivity of the electron-doped compoundsLn2_^M^CuO4_y (Ln = Pr,Nd,Sm,Eu,Gd; M = Ce,Th)M.B. Maple, N.Y. Ayoub, T. Bjornholm, E.A. Early, S. Ghamaty, B.W. Lee, J.T. Markert,J.J. Neumeier and C.L. Seaman 296

A3.2. Theory ofhigh-Tc superconductors

Spin fluctuations, spin bags and the high Tc superconductivityJ.R. Schriefer, X.G. Wen and S.C. Zhang 300

Normal state anomalies and superconductive instability of Cu-O compoundsCM. Varma 303

The Cu d-d excitation model: studies of the insulating limitW. Weber, A.L. Shelankov and X. Zotos 307

Magnetic and pairing correlations in a three band Hubbard modelR.T. Scalettar 313

A4. Contributed papers (Monday, 24 July 1989)

A4.1. Flux creep - General superconductivity

Magnetic investigation of Bi2Sr2CaCu208+^ single crystals

E. Agostinelli, G. Balestrino, D. Fiorani, R. Muzi, P. Paroli, J. Tejada and A.M. Testa 319AC-susceptibility measurements on differently prepared YBaCuO-films as a tool to provide an

additional quality criterionCh. Neumann, P. Ziemann, J. Geerk and X.X. Xi 321

Coexistence of paramagnetism and superconductivity in (Gdo.2Cao.8)Sr2(Tl0.5Pbo.5)Cu2Oj,W.H. Lee, Y.T. Huang, R.S. Liu and P.T. Wu 323

Non-linearity of the YBa2Cu307_«s low field diamagnetic properties: multi-harmonic analysisF. Lera, R. Navarro, C. Rillo, J. Bartolome, J. Blasco, J. Garcia and L.A. Angurel 325

Effect of intergranular flux pinning on the magnetic properties of YBa2Cu307_^ and(Bi0.9Pbo.i)Sr1Ca1Cu,.8Ox

G.J. Russell, K.N.R. Taylor, D.N. Matthews, A. Bailey and R.A. Vaile 327Anomalous Hc l(T) behavior of single crystalline YBa2Cu3O7_<5

H. Adrian, W. Assmus, A. Hohr, J. Kowalewski, H. Spille and F. Steglich 329

xxvi Contents

Macroscopic magnetic properties of high Tc epitaxial Y1Ba2Cu3OA: thin filmsD.C. Bullock, T.J. Folkerts, P. Klavins and R.N. Shelton ' 331

AC magnetic hysteresis and Tc measurements in high Jc superconductorsC. Radhakrishnamurty, A.K. Grover, P.K. Mishra, P. Chaddah and G.V. Subbarao 333

Comparative study of magnetization in conventional and high Tc superconductorsB.V.B. Sarkissian, A.K. Grover, G. Balakrishnan, P.L. Paulose and R. Vijayaraghavan 335

Field and temperature dependence of ZFC, FC and REM magnetization in superconductorsA.K. Grover, P.L. Paulose, P. Chaddah and G. Ravikumar 337

Temperature and field dependence of the weak-link behavior in superconducting YBa2Cu307_x

S. Gjelmesli, L.T. Sagdahl, T. Laegreid and K. Fossheim 339

Low field investigations of single crystal Bi(2212) - DC magnetizationG. Shaw, S.D. Murphy and S.M. Bhagat 341

Discontinuous jump in transverse magnetization of the flux lattice in YBa2Cu3O7 crystals ob-served by torque magnetometryT.R. Chien, Z.Z. Wang and N.P. Ong 343

PAD investigations with 62Cu and 19F in La2_^SrxCuO4 and CuOH.-E. Mahnke, A. Berger, H.H. Bertschat, K. Biedermann, J. Erxmeyer, R. Kowallik,W. Muller, B. Spellmeyer, Ch. Stenzel and A. Weidinger 345

Time-decay of magnetisation in high Tc superconductorsP. Chaddah and G. Ravikumar 347

Anisotropy of high Tc superconducting crystals investigated by torque measurementsW. Andra, H. Danan and R. Hergt 349

Critical current and electronic properties of YBCO-Ag compoundsB. Dwir, M. Affronte and D. Pavuna 351

Interlayer coupling in high temperature superconductorsA.P. Malozemoff, L. Krusin-Elbaum and J.R. Clem 353

Limiting interface model for strongly coupled oxide ceramicsG. Blatter, J. Rhyner and H. Dersch 355

Electron irradiation effect on the intergrain critical field in ceramic YBa2Cu3O7

M. Konczykowski, F. Rullier-Albenque, H. Vichery and H. Pascard 357

Transport critical currents in Bi-Sr-Ca-Cu-O pellets and single crystalsA. De Ninno, P. Gislon, M. Marinelli, G. Paterno, U. Gambardella, P. Paroli and G. Balestrino 359

Critical current densities (up to 20 T) of high Tc REBa2Cu3O7, Bi2Sr2CaCu208, Tl2Ba2CaCu208

crystalsM. Guillot, J.L. Tholence, O. Laborde, M. Potel, P. Gougeon, H. Noel and J.C. Levet 361

Critical currents and flux creep in melt processed Bi2Sr2CaCu2O8 superconductorH.W. Neumiiller and G. Ries 363

Transport measurements on granular Y-Ba-Cu-O filmsM.A. Stan, S.A. Alterovitz, D. Ignjatovic, K.B. Bhasin, G.C. Valco and N.J. Rohrer 365

Properties of high Jc BiSrCaCuO and TIBaCaCuO thin filmH. Itozaki, K. Higaki, K. Harada, S. Tanaka, S. Yazu and K. Tada 367

Supercurrent lengthscale in sintered YBCO and critical state modelV. Calzona, M.R. Cimberle, C. Ferdeghini, M. Putti, A.S. Siri and R. Vaccarone 369

Contents xxvii

Superconducting fluctuation in Ba2[Y,Ln]Cu3O7 measured by magnetoresistanceA. Matsuda, T. Ishii, K. Kinoshita and T. Yamada 371

Influence of the local strains on the rounding of the resistivity near Tc in copper oxidesuperconductorsJ. Maza, C. Torron and F. Vidal 373

A phenomenological model for the rounding of the electrical conductivity above Tlo in poly-crystalline copper oxide superconductorsJ.A. Veira, G. Domarco, J. Maza, F. Miguelez, C. Torron and F. Vidal 375

Unconventional pairing in YBa2Cu3O7_rf?J.F. Annett, N. Goldenfeld and S.R. Renn 377

BiCaSrCuO superconductors: powder synthesis, wire fabrication and hot extrusion experimentsV.M. Polvi and K.J. Niemi 379

Preliminary study of oxide superconductors for wire fabricationK. Takahashi, S. Meguro, K. Uyeda, K. Kaiho and M. Umeda 381

Fibers of YBa2Cu3O7 by pendant drop melt extractionL.A. Schwartzkopf, J.E. Ostenson, K.S. Athreya and D.K. Finnemore 383

High Tc superconducting small loop antennaZ. Wu, M.J. Mehler, T.S.M. Maclean, M.J. Lancaster and C.E. Gough 385

Nonequilibrium hot-electron transport in optically irradiated YBCO filmsA.M. Kadin, W.R. Donaldson, P.H. Ballentine and R. Sobolewski 387

YBaCuO films on silicon substrates: fabrication, characterization, and use as phonon detectorsM. Obry, J. Tate, P. Berberich and H. Kinder 389

Photon detection by high-temperature superconducting films: fundamental limitsM.G. Forrester and J. Talvacchio 391

DC Josephson effect and critical currents of YBa2Cu3O7 and Tl2CaBa2Cu2O8

R. Kleiner, P. Miiller and K. Andres 393Noise properties of bulk 2-hole SQUIDS of YBCO and BSCCO

S.G. Hammond, S.P. Harrop, CM. Muirhead, C.E. Gough, N.McN. Alford and T.W. Button 395The investigation of rf-squids at liquid nitrogen temperatures

V.N. Polushkin and B.V. Vasiliev 397Surface magnetic impedance of granular superconductor

A.A. Golubov and A.E. Koshelev 399Investigation of the phase transition at HcX in 1OW-K superconductors

H.W. Weber, E. Seidl, F.M. Sauerzopf, M. Botlo, C. Laa, E. Mayerhofer, H.P. Wiesinger andJ. Rammer 401

Magnetization and upper critical fields of LaAl2 with dilute Gd impuritiesB. Vlcek, H.W. Weber, W. Pint and E. Schachinger 403

Complex susceptibility and penetration depth of the organic superconductor, (BEDT-TTF)2Cu(NCS)2

K. Kanoda, T. Takahashi and G. Saito 405Superconductivity under hydrostatic pressure in RE5Os4Si15 compounds (RE = Y, Tb, Er)

M. Kuboth, H.F. Braun, L. Schellenberg and J. Muller 407Magnetic moments and critical currents of superconducting Mo/V and Nb/Pd-multilayers

A.J. Vermeer, C.W. Hagen, D.G. de Groot, N.J. Koeman, J.H. Rector, H. van Leuken,R. Griessen, M.G. Karkut, T.M. Triscone and 0 . Fischer 409

xxviii Contents

The anomalous H-T phase diagram of Nb/NbTi superlattices determined by critical currentsand fieldsL. Antognazza, M.G. Karkut, J.-M. Triscone, V. Matijasevic, N. Missert, M.R. Beasley and0. Fischer 411

Evidence for unconventional superconductivity in UPt3: splitting of the specific heat anomalyat Tc

N.E. Phillips, R.A. Fisher, S. Kim, B.F. Woodfield, L. Taillefer, K. Hasselbach, J. Flouquet,A.L. Giorgi and J.L. Smith 413

UPt3 at very low temperatures: specific heat in high magnetic fieldsE. Schuberth, G. Hofmann, F. Gross and K. Andres 415

Ultrasonic attenuation in heavy fermion superconductorsL. Coffey 417

Experimental determination of the absolute value of the London penetration depth in the heavyfermion superconductors UBe13 and UPt3

F. Gross, K. Andres and B.S. Chandrasekhar 419Temperature reference points using cuprate superconductors

G.A. Candela, RJ . Soulen Jr., V.M. Browning and J.F. Schooley 421Y,Ba2Cu3O7 crystal and ceramic low field magnetic properties measured by high- Tc SQUID at

nitrogen temperaturesN.V. Zavaritsky and V.N. Zavaritsky 423

Dimensional effects in layered superconductorV.I. Dediu, A.G. Sandier and A.S. Sidorenko 425

Pressure effect on the transport properties of superconducting Li09Mo6O17 bronzeC. Escribe-Filippini, J. Beille, M. Boujida, J. Marcus and C. Schlenker 427

The low-temperature phase diagram of U^^Th^BenE. Felder, A. Bernasconi, H.R. Ott, Z. Fisk and J.L. Smith 429

Electronic and phonon-mediated gap modes in A15 compoundsR. Hackl, R. Kaiser and W. Glaser 431

Phase formation and superconducting properties of Nb-Al thin filmsK. Heinemann, R. Wordenweber, J. Hoffmann, Y. Luo, B. Ullmann and H.C Freyhardt 433

The dielectrization of the YBa2Cu3O7_<s ceramic surface layer by electric voltage pulseA.A. Zhukov, V.Yu. Kokosinsky, D.A. Komarkov, M.I. Lasyer and V.V. Moshchalkov 435

The properties of electric contacts for YBa2Cu3O7_<$ ceramicsR.I. Antonov, S.N. Gordeev, A.A. Zhukov, V.V. Moshchalkov, A.V. Lebedev, S.E. Mrost andV.N. Truhan 437

Oxidation thermodynamics and the presence of localized oxygen p-holes in YBa2Cu306+y

H. Verweij and L.F. Feiner 439Mechanisms of crystallization of amorphous Y!Ba2Cu3O7_x thin films during annealing in ox-

ygen and argon atmospheres: "in situ" measurementsG. Garry, D. Dubreuil, Y. Lemaitre, D. Dieumegard, J. Siejka and C Ortega 441

Magnetic penetration depth So and critical current density in Y-Ba-Cu-O crystalsN.V. Zavaritsky and V.N. Zavaritsky 443

Contents xxix

A4.2. Thermal properties - Structure/property relations

Ultrasonic attenuation and velocity in BiSrCaCuO high Tc superconductorJ. Hu, S. Zhang, Q. Zhang, W. Cai, T. Deng, L. Zhang, Y. He and J. Xiang 444

Ultrasonic attenuation anomaly of Tl-Ca-Ba-Cu-O at superconducting transitionK.J. Sun, W.P. Winfree, M.-F. Xu, M. Levy, B.K. Sarma, A.K. Singh, M.S. Osofsky andV.M. LeTourneau 446

Structural phase transition in single crystal La2_J5rxCuO4_J, superconductor studied by ultrasoundW. Ting, T. Laegreid, K. Fossheim, J.D. Axe and Y. Hidaka 448

Anomalous structural changes and elastic properties of bismuth oxide superconductorsY.S. He, J. Xiang, F.G. Chang, J.C. Zhang, A.S. He, H. Wang and B.-L. Gu 450

Anomalous Poisson ratio and bulk modulus in high-7c superconductorsP. Lemmens, C. Hiinnekes, M. Brakmann, S. Ewert, A. Comberg and H. Passing 452

Ultrasonic study on structural instability of Bi2Sr2CaiCu2O8 single crystalY.-N. Wang, J. Wu, J.-S. Zhu, H.-M. Shen, Y.-F. Yang and Z.-X. Zhao 454

Relationship between lattice instability and superconductivity in high Tc oxide superconductorsY.-N. Wang, X.-H. Chen, H.-M. Shen and L.-H. Sun 456

The variation of the acoustic resonance frequency in high-7^ ceramics in a DC magnetic fieldV.T. Dolgopolov, R.K. Nikolaev, L.V. Ovchinnikova and N.S. Sidorov 458

Low-temperature elastic constants of polycrystalline La2CuO4 and La185Sro.i5Cu04

H. Ledbetter, S.A. Kim, C.E. Violet and J.D. Thompson 460

Observation of phonon shifts in Bi2Sr2Ca!_xYxCu208 and related high temperaturesuperconductorsB. Renker, F. Gompf, E. Gering and D. Ewert 462

Phonons in YBa2Cu3O7_(5

W. Reichardt, N. Pyka, L. Pintschovius, B. Hennion and G. Collin 464Phonon density of states YBa2Cu3Ox

V.G. Bar'yakhtar, A.S. Vasil'kevich, P.G. Ivanitsky, V.T. Krotenko, A.N. Maistrenko,A.E. Morozovsky, V.M. Pan, M.V. Pasechnik and V.I. Slisenko 466

Specific heat measurements on multiphase Bi-Sr-Ca-Cu oxide and Bi-Pb-Sr-Ca-Cu oxidesuperconductorsM.K. Yu, J.P. Franck, M.A.-K. Mohamed, W.A. Miner, J. Jung and S. Gygax 468

Magnetic determination of the specific heat jump at Tc in YBa2Cu3O7_^G. Triscone, A. Junod and J. Muller 470

Nuclear heat capacity due to the static Cu-magnetic moments in the superconducting

N. Wada, Y. Nakamura and K.i. Kumagai 472Origin of the nuclear specific heats in high-rc superconductors

R. Caspary, M. Winkelmann and F. Steglich 474

Specific heat (1-330 K), magnetic susceptibility and Meissner effect of Tl-Ba-Ca-Cu-O samplesA. Junod, D. Eckert, G. Triscone, J. Muller and V.Y. Lee 476

Specific heat (1-330 K), magnetic susceptibility (5-250 K) and phonon DOS of CuO: a studyof the magnetic transitionsA. Junod, D. Eckert, G. Triscone, J. Muller and W. Reichardt 478

Specific heat (1-330 K), magnetic susceptibility and Meissner effect of Bi-(Pb)-Sr-Ca-Cu-OsamplesA. Junod, D. Eckert, G. Triscone, O. Brunner, J. Muller and Z. Zhao 480

xxx Contents

YBa2Cu3O7_^: improvement of the specific heat behavior at low temperatures and near Tc

A. Junod, D. Eckert, T. Graf, G. Triscone and J. Muller 482

Lattice and electronic specific heat of YBa2Cu3O7

J.E. Gordon, R.A. Fisher, S. Kim and N.E. Phillips 484

Specific heat of polycrystalline YBa2Cu3O7_^ in a magnetic fieldD.M. Ginsberg, M.E. Reeves, S.E. Stupp, T.A. Friedmann, F. Slakey and M.V. Klein 486

Specific heats of Tl-Ba-Ca-Cu-O superconductorsT. Atake, H. Kawaji, M. Itoh, T. Nakamura and Y. Saito 488

Contribution to specific heat and electrical conductivity of YBa2Cu3O7_,5 from fluctuationsT. Laegreid, P. Tuset, O.-M. Nes, M. Slaski and K. Fossheim 490

Specific heat, ac susceptibility, and dc conductivity in the Bio^Pbo.sCaiSr^ULgO^ superconductorM. Slaski, T. Laegreid, O.-M. Nes, S. GJ0lmesli, P. Tuset, K. Fossheim and A. Pajaczkowska 492

Specific heat of high-Tc YBa2(Cu3_^Mx)O7 with M = Cr or ZnS. Kim, R.A. Fisher, N.E. Phillips and J.E. Gordon 494

The specific heat anomalies at Tc of the BiSrCaCuO and TIBaCaCuO high temperaturesuperconductorsE. Braun, W. Schnelle, F. Seidler, P. Bohm, W. Braunisch, Z. Drzazga, S. Ruppel, H. Broicher,H. Geus, M. Galffy, B. Roden, I. Felner and D. Wohlleben 496

A systematic study of the specific heat anomaly in La2_j:Srj:CuO4

J.W. Loram, K.A. Mirza, W.Y. Liang and J. Osborne 498

The low temperature specific heat in single crystals of YBa2Cu3O7 and its magnetic fielddependenceJ. Baak, H.B. Brom, M.J.V. Menken and A.A. Menovsky 500

Specific heat of the high-T^ superconductor (Bi, 66Pb0.34)Ca2SrCu30|oR.A. Fisher, S. Kim, Y. Wu, N.E. Phillips, H.M. Ledbetter and K. Togano 502

Low temperature specific heat of single crystal Bi2Sr2Ca!Cu2Oz

T. Sasaki, Y. Muto, T. Shishido, T. Sasaki, T. Kajitani, M. Furuyama, N. Kobayashi andT. Fukuda 504

Sign-reversal thermopower in Bi2Sr2CaCu2Oy

M.P. Boiko, V.G. Kantser, L.A. Konopko and A.S. Sidorenko 506

Evidence for an intrinsic linear term in the T-dependence of the thermal conductivity of su-perconducting YBa2Cu307 and Bi2Sr2CaCu2O8 single crystalsG. Sparn, M. Baenitz, S. Horn, F. Steglich, W. Assmus, T. Wolf, A. Kapitulnik and Z.X. Zhao 508

Power dissipation and thermal relaxation in high temperature superconductorsP. Vassilev, V. Kovachev and M.D. Mateev 510

Thermal conductivity, electrical resistivity and specific heat of high-7c Bi,.4Pb0.6Sr2Ca2Cu3Ox

superconductorK. Mori, M. Sasakawa, T. Igarashi, Y. Isikawa, K. Sato, K. Noto and Y. Muto 512

Crystal chemistry of high- Tc superconductors of the Tl-Ba-Ca-Cu-O and Tl-Pb-Sr-Ca-Cu-OsystemsT. Zetterer, H.H. Otto, K. Meidenbauer and K.F. Renk 514

High temperature structural instability of the high-rc superconductor Pb2Sr2Y1_^CaxCu3O8+(jK. Kadowaki, A.C Moleman, M.J.V. Menken, H.W. Zandbergen, A.A. Menovsky andJ.J.M. Franse 516

Contents xxxi

Crystal structure and specific heat of YBa2(Cu1_xZnx)3O7_<5 (x - 0.01 ... 0.1, S= 0.9)G. Roth, P. Adelmann, R. Ahrens, B. Blank, H. Biirkle, F. Gompf, G. Heger, M. Hervieu,M. Nindel, B. Obst, J. Pannetier, B. Raveau, B. Renker, H. Rietschel, B. Rudolf and H. Wiihl 518

The relation between twins and optical domains in YBa2Cu3O7_<sK.N.R. Taylor, A. Nouruzi-Khorosani and S. Bosi 520

Magnetic aspects of the T' phase in the Nd2_^CexCuO4_<5 systemM.J. Rosseinsky and K. Prassides 522

Single crystal study of the 80 K superconductor YBa2Cu4O8

P. Bordet, J.L. Hodeau, R. Argoud, J. Muller, M. Marezio, J.C. Martinez, J.J. Prejean,J. Karpinski, E. Kaldis, S. Rusiecki and B. Bucher 524

Analysis of superconducting transitions in c«31 and c«37 A BSCCO systemsG. Calestani, M.G. Francesconi, G. Amoretti, C. Paracchini, E. Buluggiu, D.C. Giori,A. Valenti and A. Vera 526

The influence of many-body interaction on the oxygen ordering of the Cu-0 plane in Y-Ba-Cu-O superconductorsM. Wang and B. Cu 528

High resolution synchrotron X-ray powder diffraction study of the structure of Tl2Ba2CaCu2O8

M. Eibschutz, L.G. van Uitert, W.H. Grodkiewicz and D.E. Cox 530Defect structures preceding amorphization by ion irradiations in YBa2Cu307_^

M.A. Kirk, M.C. Frischherz, J.Z. Liu, L.L. Funk, L.J. Thompson, E.A. Ryan, S.T. Ockers andH.W. Weber 532

High Tc superconductivity and crystal structure of Pb-Sr-Y, Ca-Cu-0 systemV.S. Melnikov, A.G. Popov, N.V. Dan'ko, N.P. Pshentsova, D.P. Demenko and V.M. Pan 534

Structural investigations of single crystals of high Tc superconductors: La- and Y-phasesL.A. Muradyan, V.N. Molchanov, R.A. Tamazyan and V.I. Simonov 536

On the correlation of secondary structural effects, superconductivity and crystal field interactionin ErBa2Cu3Ox - new evidence for a charge transfer mechanism?B. Rupp, P. Allenspach, P. Fischer and A. Furrer 538

Theoretical studies of structural properties of the high-rc superconductor Y,Ba2Cu3O7_A:

S. Valkealahti and D.O. Welch 540Crystal structures of LaL1Sr,.9Cu2O583 and related compounds

R.A. Steeman, D.M. de Leeuw, G.P.J. Geelen and E. Frikkee 542X-ray absorption study of superconducting BaBi^^Pb^Os and BaBiO3

T. Claeson, J.B. Boyce, F. Bridges, T.H. Geballe, J.M. Remeika and A.W. Sleight 544On the orthorhombic to tetragonal phase transition in YBa2Cu3O7_x

B.E. Vigeland and S. Julsrud 546Oxygen ordering in Y1Ba2Cu3O7_A:

R. Beyers, B.T. Ahn, G. Gorman, V.Y. Lee, S.S.P. Parkin, M.L. Ramirez, K.P. Roche,J.E. Vazquez, T.M. Gur and R.A. Huggins 548

Preparation and characterization of single phase Bai_xKxBiO3

T.J. Folkerts, R.N. Shelton and H.B. Radousky 550Effects of deformation on shielding currents in YBa2Cu3O7_^

M.J. Kramer, R.W. McCallum and L.S. Chumbley 552Possible interfacial superconducting transport in CuCl: Si

B.L. Mattes 554

xxxii Contents

Structural phase diagram of the Ba, _^K^BiO3 systemS. Pei, J.D. Jorgensen, D.G. Hinks, B. Dabrowski, D.R. Richards, A.W. Mitchell, Y. Zheng,J.M. Newsam, S.K. Sinha, D. Vaknin and A.J. Jacobson 556

Fine Y-Ba-Cu-O superconducting filaments produced by suspension spinning methodT. Goto 558

Anisotropy effect detected by TEM in Y-Ba-Cu-O at low temperatureA. Cziraki, B. Fogarassy, S. Pekker, Gy. Hutiray, P. Sovak, L. Potoczky and V. Karel 560

Phonon transport phenomena in high-7c superconductorsN.V. Zavaritsky, A.V. Samoilov, A.A. Yurgens, V.S. Klochko and V.I. Makarov 562

Magnetism and superconductivity in YBa2(Cu1_xMJC)3O7 with M = Fe and CoR. Kuentzler, S. Vilminot, Y. Dossmann, T.L. Wen and C. His 564

Thermal expansion and heat capacity of Bi4Ca3Sr3Cu4O16+(5 at low temperaturesR. Villar, S. Bourgeal, S. Vieira, J.M. Gonzalez-Calbet and M. Vallet-Regi 566

Anisotropy of lattice vibration in uniaxially aligned high temperature superconductor Ba2EuCu307

observed by Mossbauer spectroscopyM. Taniwaki, T. Muraki and K. Shiramine 568

Detailed Mossbauer studies on YBa2Cu3_^Fe^O7_a (O-T phases) with low iron contentJ.L. Dormann, S. Sayouri, G.T. Bhandage, G. Priftis, H. Pankowska, O. Gorochov andR. Suryanarayanan 570

Thermal conductivity of the Bi2(Ca0.5Sr0.5)3Cu2OA:, Tl2Ba2Ca2Cu3Ox ceramics and ErBa2Cu3Ox

single crystalF.G. Aliev, V.V. Moshchalkov and V.V. Pryadun 572

BI. Plenary papers (Tuesday, 25 July 1989)

Bl.l. Organic superconductors

An overview of anorganic superconductor: K - ( B E D T - T T F ) 2 C U ( N C S ) 2

G. Saito 577

B1.2. Theory ofhigh-Tc superconductors

The electronic structure of La2CuO4: renormalization from density functional theory to strongcoupling modelsM. Schluter and M.S. Hybertsen 583

Correlated electron motion, flux states and superconductivityP. Lederer, D. Poilblanc and T.M. Rice 587

Hole superconductivity: review and some new resultsJ.E. Hirsch and F. Marsiglio 591

Contents xxxiii

B2. Contributed papers (Tuesday, 25 July 1989)

B2.1. Flux creep - Thin film synthesis

The DC magnetron sputter deposition process of YBa2Cu3O^ thin filmsT.I. Selinder, G. Larsson, U. Helmersson, S. Rudner and I. Petrov 599

Patterning of high Tc Y-Ba-Cu-O thin films deposited on bare siliconH.-U. Habermeier and G. Mertens 601

Thin films of "123" on silicon substratesT. Puzzer, Z.T. Zheng, S. Bosi, G.J. Russell and K.N.R. Taylor 603

Orientation dependent resistive transition broadening in magnetic field of YBa2Cu307_x thinfilmsC.-B. Eom, J.Z. Sun, S. Ryu, S.S. Laderman, K. Yamamoto, A. Kapitulnik and T.H. Geballe 605

Preparation and characterization of thin Y!Ba2Cu3O7_^ films made by DC magnetron sputteringA. Hohler, H. Neeb and C. Heiden 607

C-axis oriented Y2Ba2Cu3O7_JC films using the BaF2-methodM. Moske, K. Samwer, S. Dina and G. van Minnigerode 609

YBCO films on polycrystalline BeO substrates with TZ>11 KP. Bernstein, D. Roze and S. Herpin 611

Elaboration and characterization of superconducting Bi-Sr-Ca-Cu-O and Bi(Pb)-Sr-Ca-Cu-O thin films made by DC single target sputteringH. Raffy, S. Labdi, A. Vaures, J. Arabski, S. Megtert and J. Perriere 613

Initial stage of epitaxial growth of YBa2Cu3O7_^ thin filmsT. Terashima, Y. Bando, K. Iijima, K. Yamamoto, K. Hirata, K. Kamigaki and H. Terauchi 615

Effects of Pb-layer on the superconductivity of Bi-Ca-Sr-Cu-O systemS.M. Fu, H.H. Sung, H.C Yang, D.S. Lee and H.E. Horng 617

Superconductivity in Bi-Pb-Ca-Sr-Cu-O thin filmsS.M. Fu, H.C. Yang, F.C Chen, H.E. Horng and J.C. Jao 619

Y-Ba-Cu-O thin films on sapphire substratesH. Ohlsen, J. Hudner, L. Stolt and E. Johansson 621

In-situ growth of Y1BaCu3O7_A: films by molecular beam epitaxy with an activated oxygen sourceJ. Kwo, M. Hong, D.J. Treyor, R.M. Fleming, A.E. White, J.P. Mannaerts, R.C Farrow,A.R. Kortan and K.T. Short V 623

Electrical properties of YBa2Cu3O7 thin filmsJ.S. Satchell, R.G. Humphreys, P. Sidhu, N.G. Chew, S.W. Goodyear and J.A. Edwards 625

As deposited epitaxial Dy!Ba2Cu3O thin films by M.B.E.A. Schuhl, R. Cabanel, S. Koch, J. Siejka, M. Touzeau, J.P. Hirtz and G. Creuzet 627

Low-temperature method for thin superconducting film preparationV.M. Puzikov, A.V. Semyonov, D.I. Zosim, V.L. Dubonosov, L.S. Zolotovitskaya andR.F. Ramakayeva 629

Fabrication and properties of high- Tc films deposited on LaGaO3 and LaAlO3 substratesR. Sobolewski, P. Gierlowski, W. Kula, G. Jung, S. Zarembinski, M. Berkowski, A. Dabkowskiand A. Pajaczkowska 631

Superconducting (Rb,Ba)BiO3 thin films grown by molecular beam epitaxyE.S. Hellman, E.H. Hartford and T.T.M. Palstra 633

xxxiv Contents

TEM investigation on the crystal structure of the high-rc superconductor system Bi-Pb-Sr-Ca-Cu-O doped with SbB. Kabius, M.E. Gomez, P. Prieto, S. Thierfeldt and R.R. Arons 635

Interdiffusion between Si substrates and YBaCuO filmsQ.Y. Ma, X. Wu, M.T. Schmidt, E.S. Yang and C.-A. Chang 637

Optical emission studies and preparation of high Tc Tl-Ca-Ba-Cu-O thin filmsW.Y. Lee, J.R. Salem, V.Y. Lee, T.C Huang and R. Savoy 639

Effect of Pb doping on 110 K phase formation in BiSrCaCuO thin filmsJ. Wosik, M.F. Davis, J.C Wolfe, R. Krtanenburg, J. Williams, Y.Y. Sun and P.H. Hor 641

Structural properties of high Tc epitaxial Y!Ba2Cu3Ox thin filmsD.C Bullock, G. Gorman, J.R. Salem, C. Hwang, R. Savoy, V. Lee, W. Lee, T. Huang andA. Segmuller 643

"In-situ" sputter deposition of superconducting Bi-Sr-Ca-Cu-O thin filmsT.P. Thorpe, M.S. Osofsky, E.F. Skelton, S.B. Qadri and C.R. Gossett 645

Epitaxial growth and anisotropic transport properties of YBa2Cu3O7 thin filmsO. Brunner, J.-M. Triscone, M.G. Karkut, L. Antognazza, A.D. Kent, T. Driscoll, T. Boichatand 0 . Fischer 647

Properties of BiSrCaCuO films prepared by rf triode sputteringR.E. Soltis, W.T. Donlon, S. Shinozaki, R.M. Ager, C.R. Peters, E.M. Logothetis, M. Aslam,L.E. Wenger, J.T. Chen and R. Nelson 649

Preparation of in-situ superconducting YBCO thin films by single target magnetron sputteringC.E. Caley, J.P. Collman and W.A. Little 651

Transport critical currents in epitaxial Y!Ba2Cu307_^ thin filmsD.K. Christen, C.E. Klabunde, J.R. Thompson, H.R. Kerchner, S.T. Sekula, R. Feenstra andJ.D. Budai 653

Comparison between LaGaO3, LaAlO3, KTaO3 and SrTiO3 substrates for the epitaxial growthof YBa2Cu3O7_A: thin films by a "BaF2 process"R. Feenstra, J.D. Budai, M.D. Galloway and L.A. Boatner 655

Thin films of Y-Ba-Cu-O grown in-situ by co-evaporation and plasma oxidationA.B. Berezin, S. Pan, E. Ogawa, R.M. Silver and A.L. de Lozanne 657

YBa2Cu307 films grown on epitaxial MgO buffer layers on sapphireJ. Talvacchio, G.R. Wagner and H.C. Pohl 659

Distribution of activation energies in high temperature superconductorsR. Griessen, C.W. Hagen, J. Lensink and D.G. de Groot 661

Magnetic flux relaxation of epitaxial YBa2Cu3O7_,$ films at low temperaturesJ. Lensink, C.F.J, Flipse, J. Roobeek, R. Griessen and B. Dam 663

Logarithmic to nonlogarithmic flux creep transition and magnetic flux hardening in BiSrCaCuOsuperconducting ceramicsH. Safar, C. Duran, J. Guimpel, L. Civale, J. Luzuriaga, E. Rodriguez, F. de la Cruz,C. Fainstein, L.F. Schneemeyer and J.V. Waszczak 665

Multiple phases or multiple flux lattice melting temperatures: vibrating reed studies on Bi-basedceramicsA. Gupta, P. Esquinazi, H.F. Braun and E.H. Brandt 667

Flux flow resistivity in single crystal YBa2Cu3O7_5

W.K. Kwok, U. Welp, G.W. Crabtree, K.G. Vandervoort and J.Z. Liu 669

Contents xxxv

Critical current densities in textured thin films of Bi-Sr-Ca-Cu-oxideJ.T. Kucera, D.G. Steel, D.W. Face, J.M. Graybeal, T.P. Orlando and D.A. Rudman 671

Diagmagnetic shielding and flux creep in a Tl-Ba-Ca-Cu-O thin filmE.L. Venturini, J.F. Kwak, D.S. Ginley, R.J. Baughman and B. Morosin 673

Effects of magnetizing on flux pinning force for sintered YBCO superconductorS.Y. Ding, J.L. Yan, Z. Yu, K.X. Shi, H.W. Tong and L. Qiu 675

Comparison of flux pinning in superconducting Tl-Ca-Ba-Cu-O single crystals and thin filmM. Nakao, K. Kawaguchi, H. Furukawa, K. Shikichi and Y. Matsuta 677

,u+SR studies of lux mobility in the mixed state of Bi2Sr2CaCu2O8

B.J. Sternlieb, L.P. Le, G.M. Luke, Y.J. Uemura, J.H. Brewer, J.F. Carolan, P. Dosanjh,W.N. Hardy, R. Kadono, R.F. Kiefl, S.R. Kreitzman, T.M. Riseman, P.W. Schleger,M.R. Davis, C.E. Stronach, Y. Hidaka, T. Murakami, J. Gopalakrishnan, A.W. Sleight andA.R. Strzelecki 679

Study of flux flow in high Tc superconductorsS. Takacs and F. Gomory 681

Electric resistance in the mixed state of the high Tc oxide filmsN. Kobayashi, H. Kawabe, H. Iwasaki, K. Watanabe, H. Yamane, H. Kurosawa, H. Masumoto,T. Hirai, T. Matsushita and Y. Muto 683

Intergrain coupling and flux creep in textured Bi-based oxide superconductorH. Kumakura, K. Togano, H. Maeda and E. Yanagisawa 685

Vortex motion and time dependent magnetic responses in high Tc superconductorsJ.Z. Sun, C-B. Eom, B. Lairson, J.C Bravman, T.H. Geballe and A. Kapitulnik 687

Critical currents and magnetic relaxation in neutron irradiated Y123M.E. McHenry, J.O. Willis, M.P. Maley, J.D. Thompson, J.R. Cost and D.E. Peterson 689

The magnetic properties of superconducting Tl-Ba-Ca-Cu-O systemY. Zhang, X. Mao, L. Chen and X. Cao 691

Microstructure and superconductive glassy state in high-rc superconducting ceramicsY. Zhao and Q. Zhang 693

Low-field flux motion in single crystal Y,Ba2Cu3O7_^ and in other superconductorsA.C. Mota, A. Pollini, P. Visani and G. Juri 695

Scaling of the irreversible magnetization curves of YBaCuOE.R. Yacoby, Y. Wolfus, Y. Yeshurun, I. Felner and H. Sompolinsky 697

Flux creep limited current in YBa2Cu307_,s ceramics under applied fieldsU. Dai, L.R. Tessler, N. Hess, G. Deutscher, N. Bontemps, G. Vetter, F. Queyroux,R. Nahoum, M. Lagues and P. Mocaer 699

Observation of thermally activated flux motion in weak link structuresM.P. Maley, M.E. McHenry, J.O. Willis and M. McElfresh 701

Correlation between the in situ growth conditions of YBCO thin films and the thermodynamicstability criteriaR.H. Hammond and R. Bormann 703

On the fabrication of flat post-annealed YBa2Cu3O7_,5 filmsB. Dam and D. Scholten 705

Effect of the atmosphere annealing on the structure of Bi2Sr2CaCu2O8 thin films grown on(100 )SrTiO3 substratesA. Perrin, Z.Z. Li, J. Padiou and M. Sergent 707

xxxvi Contents

Bi-Sr-Ca-Cu-oxide thin films with Tc> 100 K and dc SQUIDSD.W. Face, J.T. Kucera, D.G. Steel, J.M. Graybeal, T.P. Orlando and D.A. Rudman 709

Molecular beam epitaxy growth of Bi-Sr-Ca-Cu-O thin filmsY. Nakayama, I. Tsukada, A. Maeda and K. Uchinokura 711

Superconducting YBa2Cu3O7 thin films grown in-situ by ion beam co-depositionB.J. Kellett, J.H. James, A. Gauzzi, B. Dwir and D. Pavuna 713

High Tc superconducting films grown by magnetron and laser-beam techniqueA.I. Golovashkin, E.V. Ekimov, S.I. Krasnosvobodtsev, V.P. Martovitsky and E.V. Pechen 715

B2.2. Superconducting properties - Theory (microscopic)

Anomalous field-dependence of Meissner fraction in bulk and successively pulverized Y-Ba-Cu-OR. Puzniak, Y. Zhang, K.V. Rao and S. Tyagi 717

Resistive transitions of Ni-doped Ba2YCu3O7 in high-magnetic fieldsK.A. Delin, E.J. McNiff Jr., S. Foner, T.P. Orlando, R.B. van Dover, L.F. Schneemeyer andJ.V. Waszczak 719

Superconductivity enhancement in the (Tl,Pb) (A,R)2CuO5 system (A=Sr, Ba; R=La, Pr, Nd)J.B. Shi, M.J. Shieh, T.Y. Lin and H.C. Ku 721

Fluctuations and critical fields in (Y-Sm) HTSCM. Carrera, X. Granados, J. Fontcuberta, X. Obradors, M. Vallet and J.M. Gonzalez-Calbet 723

Upper critical magnetic field of Y1_2jcCaJCThxBa2Cu3O7_<s

M. Andersson and O. Rapp 725Shielding anomalies in granular oxide superconductors

M. Borik, M. Chernikov, P. Ivanov, V. Osiko, V. Stepankin and V. Veselago 727

A magnetic and specific heat study of Bi2_A.PbArSr2Ca2Cu4O1,_x/2+j, high-7c superconductorsM. Rosenberg, W. Chojetzki, M. Mittag, R. Job, R. Wernhardt, H. Bach and P. Stauche 729

Upper critical field of Bi-Pb-Sr-Ca-Cu-O systemY. Zhang, X. Mao, H. Liu and L. Chen 731

Temperature dependence of the lower critical field of single crystal YBa2Cu3O7_^A. Umezawa, G.W. Crabtree, K.G. Vandervoort, U. Welp, W.K. Kwok and J.Z. Liu 733

The temperature and angular dependence of the upper critical field of YBa2Cu3O7_,5 crystalsU. Welp, W.K. Kwok, G.W. Crabtree, K.G. Vandervoort and J.Z. Liu 735

Electrical properties and Tc of Bi2CaSr2Cu2O8 up to pressures of 15 GPAE.N. van Eenige, R.J. Wijngaarden, H. Hemmes, J.J. Scholtz, J.J. de Kleuver and R. Griessen 737

Toward the true stress dependence of Tc for YBa2Cu3O69

U. Koch, J. Wittig and B. Gegenheimer 739Dependence of the magnetization of superconducting yttrium and thallium compounds on ox-

ygen content and high hdyrostatic pressureC. Allgeier, R. Sieburger, H. Gossner, J. Diederichs, H. Neumaier, W. Reith, P. Muller andJ.S. Schilling 741

Pressure effect on superconducting Ba1_xKxBiO3 and BaPb,_xBixO3

H. Uwe, T. Osada, A. Iyo, K. Murata and T. Sakudo 743Pressure dependence of Tc in Nd, 85Ce015CuO4

J.E. Schirber, E.L. Venturini, B. Morosin and D.S. Ginley 745

Contents xxxvii

Radiation defects and pressure effects on the critical current in YBa2Cu3O7 single crystalsM. Konczykowski, F. Rullier-Albenque and G. Collin 747

Low temperature electron irradiation of YBa2Cu307

H. Vichery, F. Rullier-Albenque, M. Konczykowski, H. Pascard, R. Kormann, G. Collin andD. Favrot 749

Magnetization of neutron irradiated YBa2Cu3O7_rf single crystalsF.M. Sauerzopf, H.P. Wiesinger, H.W. Weber, G.W. Crabtree and J.Z. Liu 751

Oxygen isotope effect in the superconductor YBa2Cu3O7_x

J.P. Franck, J. Jung, G.J. Salomons, W.A. Miner, M.A.-K. Mohamed, J. Chrzanowski,S. Gygax, J.C Irwin, D.F. Mitchell and I. Sproule 753

18O isotope effect on Tc in La2_;cSrcCuO4 as a function of xM.K. Crawford, M. Kunchur, W.E. Farneth, E.M. McCarron and S.J. Poon 755

Coulomb correlation effects in YBaCuO systemJ. Costa-Quintana, F. Lopez-Aguilar, S. Balle, J.S. Munoz and A. Sanchez 757

Dielectric response in high Tc superconductorsF. Lopez-Aguilar, J. Costa-Quintana, S. Balle, F. Febrero, M.T. Aurell, A. Sanchez andJ.S. Munoz 759

Competition and possible coexistence of antiferromagnetic and RVB states in 2D HeisenbergmodelH. Chen, Z. Su and L. Yu 761

The antiferromagnetic order in the Hubbard modelV.A. Ivanov and R.O. Zaitsev 763

Pairing in CuO2 driven by exchange interactions between carriers and localized Cu spinsE.B. Stechel and D.R. Jennison 765

The cuprate superconductors: narrow correlated-electron bands and interlayer pairing via plane-chain charge transferJ. Ashkenazi and C.G. Kuper 767

Consequences of Fermi surface geometryW.A. Harrison 769

Recent numerical results on the two dimensional Hubbard modelA. Parola, S. Sorella, S. Baroni, R. Car, M. Parinello and E. Tosatti 771

Wave function, spectrum and effective mass of holes in 2D quantum antiferromagnetZ. Su, Y. Li, W. Lai and L. Yu 773

Effective Hamiltonian for high Tc Cu oxidesH. Fukuyama and H. Matsukawa 775

Charged vortices in the negative U Hubbard modelL.F. Feiner and J. Zaanen 777

Competition of anharmonic electron-phonon and electron-electron interaction in ferroelectricand superconducting oxidesA. Bussmann-Holder, H. Biittner and A. Simon 779

Possible mechanism of superconductivity in electron superconducting cupratesH. Kamimura, S. Matsuno and K. Ishida 781

Quasiparticles and photoemission spectra in correlated fermion systemsP. Horsch, W.H. Stephan, K. van Szczepanski, M. Ziegler and W. von der Linden 783

xxxviii Contents

Itinerant vs. localized antiferromagnetism of CuO2 layersE. Arrigoni, G. Strinati and C. Castellani 785

On d-wave pairing in one band Hubbard modelN.M. Plakida, V.Yu. Yushankhai and I.V. Stasyuk 787

Oxygen hole pairing and clustering due to Cu-0 coulomb repulsion in high temperaturesuperconductorsM.W. Long and W. Barford 789

Topological excitations and phase transition hierarchy in strongly correlated electronic sytemsA. Protogenov 791

Superconducting correlations in the one- and two-band Hubbard modelsK.P. Jain, R. Ramakumar and C.C. Chancey 793

Superconductivity and interaction of band electrons with RVB ordered systemD.V. Fil' and O.I. Tokar' 795

Eliashberg equations analogue in Anderson model for HTSCD.V. Fil', D.O. Livdan and O.I. Tokar' 797

Formation, motion and high-temperature superconductivity of large bipolaronsD. Emin 799

Critical temperature and upper critical field of superconductors for different Fermi surface modelsW. Pint, M. Prohammer and E. Schachinger 801

Polaron theory of high-7c superconductorsA.S. Alexandrov 803

Fermi surface of the one-dimensional Hubbard model: finite-size effectsC. Bourbonnais, H. Nelisse, A. Reid and A.-M.S. Tremblay 805

Monte Carlo simulation for CuO2 layers: 3-band Hubbard modelG. Dopf, A. Muramatsu and W. Hanke 807

What is the essential many-body Hamiltonian for copper-oxide superconductors?J.F. Annett and R.M. Martin 809

Weak- and strong-coupling expansions for the multi-band Hubbard modelJ. Wagner, R. Putz, B. Ehlers, L. Lilly, A. Muramatsu and W. Hanke 811

Collective quantum tunneling model of high-rc superconductorsD. Zhou and N.S. Sullivan 813

S-wave pairing mediated by double excitation of triplet in two band systems with intermediateelectron correlationK. Nasu 815

CDW instability near the superconducting transition in YBa2Cu3O7_a

P. Hertel, J. Appel and J.C Swihart 817

Flux phases and superconductivityP. Lederer and T.M. Rice 819

Local spin screening in the high Tc superconductorsJ. Zaanen and O. Gunnarsson 821

Incommensurate magnetic phases in doped high Tc compoundsM. Gabay and P.J. Hirschfeld 823

Contents xxxix

Static magnetic order in electron-superconductor related compoundsG.M. Luke, L.P. Le, B.J. Sternlieb, Y.J. Uemura, J.H. Brewer, R. Kadono, R.F. Kiefl,S.R. Kreitzman, T.M. Riseman, M.B. Maple, CL. Seaman, K. Kakurai, S. Uchida, H. Takagi,Y. Tokura, Y. Hidaka, T. Murakami, J. Gopalakrishnan, A.W. Sleight and M.A. Subramanian 825

Magnetic and transport properties of superconducting (YBa2Cu3O7_(5)1_^Ag^ ceramicsO. Laborde, B. Souletie, M. Guillot, J.J. Capponi, P. Lejay, J.L. Tholence, A. Ermolieff,S. Marthon, B. Dwir and D. Pavuna 827

Magnetic excitations in La2CuO4

R.R.P. Singh 829Magnetic properties of Y-Ba-Cu-O ceramics undoped and doped with Ni and Dy

Gh. Ilonca, S. Simon, I. Ardelean, R. Redac, O. Cozar and I. Barbur 831Upper critical field and electronic structure features of Ho(Y)Ba2Cu3O7_x single-crystal films

E.V. Ekimov, A.I. Golovashkin, S.I. Krasnosvobodtsev, E.V. Pechen, N.P. Shabanova,S.V. Antonenko, V.F. Elesin, A.S. Molchanov and V.E. Zhuchkov 833