Comparative study of phase transitions in BaTiO3 thin films grown on (001)- and (110)-oriented SrTiO3 substrate

被引：29

作者：

Shimizu, Takao ^{[1
]}

Suwama, Dai ^{[1
]}

Taniguchi, Hiroki ^{[1
]}

Taniyama, Tomoyasu ^{[1
]}

Itoh, Mitsuru ^{[1
]}

机构：

[1] Tokyo Inst Technol, Mat & Struct Lab, Yokohama, Kanagawa 2268503, Japan

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2013年 / 25卷 / 13期

关键词：

FERROELECTRICITY; BOUNDARY; CRYSTALS;

D O I：

10.1088/0953-8984/25/13/132001

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

An increase of the Curie temperature, T-C, was demonstrated for BaTiO3 (BTO) epitaxial thin films grown by a pulsed laser deposition technique on (001) and (110) SrTiO3 (STO) substrates. The T-C values for the BTO films on (001) and (110) STO were determined, from the temperature dependence of the lattice constants, to be 720 and 550 K, respectively, both of which are higher than that for bulk BTO. The increase of T-C for the film on (001) BTO is suggested to stem from a large tetragonal deformation with a tetragonality of similar to 1.02 due to a two-dimensional clamping effect, which persists even in the paraelectric phase. That for the (110) BTO film, on the other hand, could be caused by a one-dimensional clamping effect due to uniaxial strain.

引用

页数：5

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