Low DC Electric-Field-Induced Phase Transition in KTa0.59Nb0.41O3 Crystal

被引：13
|
作者：
Li, Xiaojin [1 ,2 ]
Yang, Quanxin [1 ,2 ]
Zhang, Xin [3 ]
He, Shan [1 ,2 ]
Liu, Hongliang [1 ,2 ]
Wu, Pengfei [1 ,2 ]
机构：
[1] Nankai Univ, Inst Modern Opt, Tianjin 300371, Peoples R China
[2] Tianjin Key Lab Optoelect Sensor & Sensing Networ, Tianjin 300071, Peoples R China
[3] Hubei Univ Arts & Sci, Hubei Key Lab Low Dimens Optoelect Mat & Devices, Xiangyang 441053, Peoples R China
来源：
CRYSTAL GROWTH & DESIGN | 2020年 / 20卷 / 02期
基金：
中国国家自然科学基金;
关键词：
SINGLE-CRYSTALS; POLARIZATION; GROWTH;
D O I：
10.1021/acs.cgd.9b01509
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Cubic to tetragonal phase transition (PC-T) in relaxor ferroelectric KTa1-xNbxO3 (x is the composition of Nb) occurs at room temperature and thus receives much attention due to its practical device applications. However, the mechanisms of electric-field-induced PC-T remain unclear due to the limited study and technical challenges. We study the PC-T, process induced by low direct current (DC) electric field using KTa0.59Nb0.41O3 single crystal by detection of real-time Raman, relative permittivity, and ferroelectric domain. Several notable features indicating the PC-T process are observed in the Raman spectrum with application of the electric field. In addition, it is found that the electric-field-induced PC-T, exists in a small temperature range, which is consistent with Landau-Devonshire (LD) phenomenological theory.
引用
收藏
页码：1248 / 1253
页数：6
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