Phase boundary and electric field induced polarization rotation in lead-free Ba(Zr0.2Ti0.8)O3-(Ba0.7Ca0.3)TiO3

被引：1

作者：

Du, Bingfeng ^{[1
]}

Ma, Wenhui ^{[1
]}

机构：

[1] Shantou Univ, Dept Phys, Shantou, Peoples R China

来源：

PHASE TRANSITIONS | 2020年 / 93卷 / 07期

关键词：

Phenomenological modeling; lead-free ferroelectrics; free energy profile; polarization rotation; phase coexistence; BARIUM-TITANATE; PIEZOELECTRICITY; TEMPERATURE; TRANSITIONS; MECHANISM; ORIGIN;

D O I：

10.1080/01411594.2020.1770755

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Ba(Zr0.2Ti0.8)O-3-x(Ba0.7Ca0.3)TiO3(BZT-xBCT) is a promising lead-free ferroelectric system with high piezoelectricity. Here we carry out phenomenological calculations to explore phase stability and electric field induced phase transition. Study of free energy variation near phase boundaries revealed ultralow energy barrier in single orthorhombic phase region and phase coexistence around inter-ferroelectric transitions. The calculated critical electric field for tetragonal-orthorhombic transition is in reasonable agreement with experimental data. Temperature-composition phase diagram under [001], [011] and [111] oriented electric field are computed, and polarization rotation associated monoclinic structures are studied.

引用

页码：666 / 677

页数：12

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