Electronic Properties of Ceramic Films Tim Jurasevich Advisor: Dr. Kvam.
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Transcript of Electronic Properties of Ceramic Films Tim Jurasevich Advisor: Dr. Kvam.
Perovskites
ABO3
Middle atom can move
Cubic above Curie temperature
Structure changes below Curie temperature
Permanent dipole
Research Goals
Create Strontium Ruthenate (SrRuO3) and Lanthanum Nickelate (LaNiO3) thin films
Sol-gel process Refine process Investigate properties of the thin films
Sol-gel process
SrRuO3 sol-gel RuCl3 Ethanol Water SrAc2
H2O2
Black More black
LaNiO3 sol-gel La(NO3)3
2-methoxyethanol MEA NiAc2
Dark Blue
Sputtering Platinum
Platinum stripes sputtered along the edges and in the middle
Lots of platinum required for good electrode
X-Ray Diffraction
Sample 2 - SrRuO3 5 Layer
20 25 30 35 40 45 50 55 60 65 70 75 80
2θ
Inte
ns
ity
(A
.U.)
X-Ray Diffraction
Sample 6 - SrRuO3 5 Layer Low pH
20 25 30 35 40 45 50 55 60 65 70 75 80
2θ
Inte
nsi
ty (
A.U
.)
Conclusions
SrRuO3 and LaNiO3 can be prepared by sol-gel methods
Both thin films exhibit fairly low resistivities
Process variations affect crystallographic texture