J Materiomics 4(2018) ivvii

viGraphical abstracts / J Materiomics 4(2018) ivvii

Graphical abstracts / J Materiomics 4(2018) ivviivii

J Materiomics Vol 4, 2018

Graphical abstracts

REVIEW ARTILE Inclusion in Web of Science and Scopus

A brief review of ferroelectric control of magnetoresistance in organic spin valves

Xiaoshan Xu

pp. 1–12

Ferroelectricity has been introduced to organic spin valves to manipulate the magneto transport, providing a knob to vary the interfacial energy alignment and the interfacial crystal structures, both are critical for the spin transport at the interface. In this review, we discuss the recent efforts of controlling magnetoresistance of organic spin valves using ferroelectricity, where the ferroelectric materials are either inserted as an interfacial layer or used as the spacer material. These efforts advance the understanding of the spin transport through the ferromagnet/organic interfaces and the results promise more functionality of organic spintronic devices.

REVIEW ARTILE Inclusion in Web of Science and Scopus

Requirements for the transfer of lead-free piezoceramics into application

Jurij Koruza, Andrew J. Bell, Till Fromling, Kyle G. Webber, Ke Wang and Jürgen Rödel*

pp.13–26

· Following the discovery of high primary properties, research of lead-free materials is now entering a second phase.

· Transfer of lead-free piezoceramics into products requires the assessment of various application-relevant properties.

· Most relevant are cost, reproducibility, mechanical and thermal properties, electrical conductivity, and lifetime.

· Succinct guidelines for future pertinent research requirements are summarized.

ORIGINAL RESEARCH ARTICLE Inclusion in Web of Science and Scopus

Ferroelectric domains and phase transition of sol-gel processed epitaxial Sm-doped BiFeO3 (001) thin films

Zhen Zhou, Wei Sun, Zhenyu Liao, Shuai Ning, Jing Zhu and Jing-Feng Li*

pp.27–34

· The 12% Sm-doped BiFeO3 epitaxial thin films on Nb-doped SrTiO3 (001) substrate were prepared via a sol-gel method.

· The in-situ ferroelectric domain evolution from room temperature to 200 °C was characterized by PFM.

· A phase transition from ferroelectric to antiferroelectric phase was illustrated by SS-PFM.

· A significant piezoelectric response was found at the phase boundary.

ORIGINAL RESEARCH ARTICLE Inclusion in Web of Science and Scopus

Dielectric relaxation of interfacial polarizable molecules in chitosan ice-hydrogel materials

Y.Q. Li, C.X. Zhang, P. Jia, Y. Zhang, L. Lin, Z.B. Yan, X.H. Zhou and J.-M. Liu*

pp.35–43

· In this work, we investigate the dielectric relaxation spectroscopy of the chitosan ice-hydrogels, which demonstrates several novelties as highlighted below:

· An experimental strategy to investigate the dielectric properties of chitosan ice-hydrogels has been developed.

· The dielectric response of chitosan hydrogels below the water solidifying point (ice-hydrogels) has been measured so that the properties of the chitosan-water interfacial molecules can be partially probed.

· The thermal activation energy for the relaxation of chitosan-ice interfacial polarizable molecules has been evaluated.

ORIGINAL RESEARCH ARTICLE Inclusion in Web of Science and Scopus

High discharged energy density of polymer nanocomposites induced by Nd-doped BaTiO3 nanoparticles

Jing Wang*, Juntao Hu, Lu Yang, Kongjun Zhu, Bao-Wen Li**, Qiaomei Sun, Yanxin Li and Jinhao Qiu

pp.44–50

· Nd-doped BaTiO3 (NBT) particles were introduced into PVDF to increase the energy storage density.

· The composite shows a discharged energy density of 12.5 J/cm3 with a small loading of 1 vol.% NBT.

· NBT/PVDF shows a comparable discharged energy density to the composites filled with core-shell nanoparticles and nanofibers.

ORIGINAL RESEARCH ARTICLE Inclusion in Web of Science and Scopus

Correlation of structural and electrical properties of PrBaCo2O5 thin films at high temperature

Brennan Mace, Zach Harrell, Xing Xu, Chonglin Chen*, Erik Enriquez, Aiping Chen and Quanxi Jia

pp.51–55

· Mechanical deformation of highly epitaxial PrBaCo2O5  thin films induced by order/disorder oxygen vacancy structures

· Strong correlation of deformed structures and electrical properties of highly epitaxial PrBaCo2O5  thin films

· Strong anisotropic thermal expansion behavior at high temperatures

ORIGINAL RESEARCH ARTICLE Inclusion in Web of Science and Scopus

Structural evolution and reaction mechanism of lithium nickelate (LiNiO2) during the carbonation reaction

Daniela González-Varela, Brenda Alcántar-Vázquez, Heriberto Pfeiffer

pp.56–61

· CO2 chemisorption mechanism on LiNiO2 was evaluated

· CO2 chemisorption on LiNiO2 exhibited an atypical thermal behavior in comparison to other alkaline ceramics

· LiNiO2 reacts with CO2 through a complex structural evolution process, where lithium is partially released

· Lithium release produced the formation of different Li1-xNi1+xO2 crystalline phases

· CO2 chemisorption results fitted to specific lithium coefficients of different lithium nickelate phases

ORIGINAL RESEARCH ARTICLE Inclusion in Web of Science and Scopus

Thermoelectric properties of In-Hg co-doping in SnTe: Energy band engineering

Xiaofang Tan, Guoqiang Liu, Jingtao Xu*, Xiaojian Tan, Hezhu Shao, Haoyang Hu, Haochuan Jiang, Yalin Lu** and Jun Jiang

pp.62–67

· We investigate the interplay between resonant level and band convergence in In-Hg co-doped SnTe.

· An apparent competition effect between band convergence doping and resonant level doping is observed in our experiment.

· The Seebeck coefficients of the co-doped samples have a great improvement (over 50 μVK−1) at room temperature.

· A ZTmax ~ 0.9 at 850 K are achieved in Sn0.98Bi0.02Te-1% HgInTe2.

ORIGINAL RESEARCH ARTICLE Inclusion in Web of Science and Scopus

Thermoelectric properties of In-substituted Ge-based clathrates prepared by HPHT

Binwu Liu, Hongan Ma*, Dexuan Huo, Haiqiang Liu, Baomin Liu, Jiaxiang Chen and Xiaopeng Jia**

pp.68–74

· HPHT is a simple and rapid synthetic approach.

· The processing time reduces from few days to an hour.

· A minimum thermal conductivity of 0.84 Wm−1K−1 is obtained, and a good ZT value of 0.52 is achieved.

· The reduction of thermal conductivity root in the rich microstructure and defects caused by HPHT.

SHORT COMMUNICATION Inclusion in Web of Science and Scopus

Thermoelectric properties of Ag-doped compound: Mg3-xAgxSb2

Yanan Fu, Xin Zhang*, Hongliang Liu, Jie Tian and Jiuxing Zhang

pp.75–79

Mg3-xAgxSb2 (0≤x≤0.05) has been prepared successfully by vacuum suspension smelting and Spark Plasma Sintering technique. The results show that Ag doping can precisely tune the electrical transport properties and accordingly enhance the power factor, without destroy the original lamellar structure of the matrix. A maximum ZT of ~0.66 at 773 K was achieved in Mg2.96Ag0.04Sb2.

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Temperature (°C)

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Li content (x) in Li

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NiO

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LiNiO2OLiNi2LiNiO2 + CO2→ Li1-xNi1+xO2 + Li2CO3 + 1-xNiO + O2CO2chemisorption and lithium content evolution on LiNiO2as a function of temperature