Journal of the Ceramic Society of Japan
Online ISSN : 1348-6535
Print ISSN : 1882-0743
ISSN-L : 1348-6535
Feature: Evolution of Dielectric Materials II: Papers
Influence of Ba/Sr ratio in compressively-strained (Ba,Sr)TiO3(001) films on the ferroelectric phase transition
Tomoaki YAMADAItaru TAKUWATakafumi KAMOTakashi IIJIMAMasahito YOSHINOTakanori NAGASAKIHiroshi FUNAKUBO
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2013 Volume 121 Issue 1416 Pages 690-692

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Abstract
The in-plane compressed (001)-epitaxial (Ba,Sr)TiO3 [BST] films with different Ba/Sr ratio were fabricated on (001)cSrRuO3/(001)SrTiO3 and (001)cSrRuO3/(001)(La,Sr)(Al,Ta)O3 by RF magnetron sputtering. Regardless of the Ba/Sr ratio, the in-plane compressive strain shifts the ferroelectric phase transition to higher temperatures; however, the magnitude of its impact varies by the Ba/Sr ratio. With increasing the Ba/Sr ratio, the sensitivity to the strain becomes larger, which can be associated with the compositional dependence of Curie–Weiss constant, electrostrictive constant and elastic constant of BST.
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© 2013 The Ceramic Society of Japan
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