Experimental study of effect of strain on electrocaloric effect in (001)-epitaxial (Ba, Sr)TiO3 thin films

被引：7
|
作者：
Yamada, Tomoaki [1 ]
Matsuo, Shogo [1 ]
Kamo, Takafumi [2 ]
Funakubo, Hiroshi [2 ]
Yoshino, Masahito [1 ]
Nagasaki, Takanori [1 ]
机构：
[1] Nagoya Univ, Dept Energy Engn, Nagoya, Aichi 4648603, Japan
[2] Tokyo Inst Technol, Sch Mat & Chem Technol, Yokohama, Kanagawa 2268503, Japan
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS | 2017年 / 56卷 / 10期
关键词：
2-STEP GROWTH TECHNIQUE; DIELECTRIC-PROPERTIES; INTERNAL-STRESSES; PHASE-DIAGRAMS; FERROELECTRICITY; INPLANE;
D O I：
10.7567/JJAP.56.10PF15
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The effect of strain on the electrocaloric effect in (001)-epitaxial (Ba, Sr)TiO3 (BST) thin films was experimentally investigated via indirect estimation by measuring the electric field dependence of polarization at various temperatures. Compressively strained (Ba0.3Sr0.7)TiO3 films were deposited on (001)(c)SrRuO3/(001)SrTiO3 and (001)(c)SrRuO3/(001)(La0.3Sr0.7)(Al0.65Ta0.35)O-3 (LSAT) by RF magnetron sputtering. The BST film on (001) cSrRuO(3)/(001)SrTiO3 showed a higher ferroelectric-to-paraelectric phase transition temperature than that on (001) cSrRuO(3)/(001) LSAT owing to the larger compressive strain. It was revealed that the electrocaloric effect is maximized at around the ferroelectric-to-paraelectric phase transition temperature modified by the compressive strain in the films. (C) 2017 The Japan Society of Applied Physics
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页数：5
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