All-Epitaxial Trilayered Ferroelectric (Bi,La)4Ti3O12/Pb(Zr0.4Ti0.6)O3/(Bi,La)4Ti3O12 Thin Films on SrTiO3 Substrates by Pulsed Laser Deposition

概要

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Trilayered ferroelectric (Bi,La)4Ti3O12 (BLT)/Pb(Zr,Ti)O3 (PZT)/(Bi,La)4Ti3O12 thin films were grown epitaxially on SrTiO3 (STO) substrates by pulsed laser deposition. The epitaxial relationships between BLT, PZT and STO were identified to be $\text{BLT}(001)\parallel\text{PZT}(001)\parallel\text{STO}(001)$ and $\text{BLT}[110]\parallel\text{PZT}[100]\parallel\text{STO}[100]$ for the trilayered thin films on (001)-oriented STO substrates, whereas for the trilayered thin films on (011)-oriented STO substrates, the epitaxial relationships were $\text{BLT}(118)\parallel\text{PZT}(011)\parallel\text{STO}(011)$ and $\text{BLT}[\bar{1}\bar{1}0]\parallel\text{PZT}[100]\parallel\text{STO}[100]$. The morphology of the BLT/PZT interfaces and of the surface of the trilayered thin films depended largely on the orientation of the film layers. A rather large remanent polarization as well as a high fatigue resistance of up to $10^{10}$ switching pulse cycles was obtained for the trilayered thin films deposited on SrRuO3-coated STO substrates.
Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
2005-09-15