Crystal structure, ferroelectric and piezoelectric properties of epitaxial (1-x)(Bi0.5Na0.5)TiO3-x(Bi0.5K0.5)TiO3films grown by hydrothermal method

被引：9

作者：

Huang, Yu ^{[1
]}

Ito, Yoshiharu ^{[1
]}

Tateyama, Akinori ^{[1
]}

Kurosawa, Minoru ^{[2
]}

Funakubo, Hiroshi ^{[1
]}

机构：

[1] Tokyo Inst Technol, Dept Mat Sci & Engn, Midori Ku, J2-43,4259 Nagatsuta Cho, Yokohama, Kanagawa 2268502, Japan

[2] Tokyo Inst Technol, Dept Elect & Elect Engn, Midori Ku, G2-32,4259 Nagatsuta Cho, Yokohama, Kanagawa 2268502, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2020年 / 59卷 / SP期

基金：

日本科学技术振兴机构;

关键词：

Hydrothermal synthesis; (1-x)BNT-x; BKT epitaxial films; Composition dependencies; Ferroelectric and piezoelectric properties; TITANATE THIN-FILM; ELECTRICAL-PROPERTIES; LARGE PIEZORESPONSE; IMPRINT BEHAVIOR; LEAD; TEMPERATURE; CERAMICS; POLARIZATION; SENSOR;

D O I：

10.35848/1347-4065/abad45

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The composition dependencies of crystal structure, and electrical and electromechanical properties were systematically investigated for epitaxial films of (1-x)(Bi0.5Na0.5)TiO3-x(Bi0.5K0.5)TiO3[(1-x)BNT-xBKT (x = 0 -1)] deposited on (100)(c)SrRuO3//(100)SrTiO(3)substrates by a hydrothermal method. An In-plane crystal lattice was clamped by that of underlying SrRuO(3)irrespective of thexvalue. The dielectric constant decreased monotonously with increasingx. The polarization-electric field hysteresis loops were imprinted due to the preferential polarization in the films. In addition, the increase of tetragonality with increasingxvalue contributes to the increase of saturation and remnant polarization (P(sat.)andP(r), respectively), coercive field (E-c) as well asP(r)/P(sat.)values. The effective piezoelectric coefficient (nearE = 0 kV cm(-1)) improved considerably with increasingx, reaching a maximum of 62 pm V(-1)in the BKT film. A comprehensive and systematic study has been performed on (1-x)BNT-xBKT epitaxial films in this work, which lays the foundation for further research of this system in the future.

引用

页数：8