Nontrivial behavior of Tc at the small electric field in BaTiO3 crystals, detected by means of acoustic emission

被引：10

作者：

Dul'kin, E. ^{[1
]}

Roth, M. ^{[1
]}

机构：

[1] Hebrew Univ Jerusalem, Dept Appl Phys, IL-91904 Jerusalem, Israel

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2013年 / 25卷 / 15期

关键词：

CHARACTERISTIC TEMPERATURES; PHASE-TRANSITIONS; RELAXOR; POLARIZATION;

D O I：

10.1088/0953-8984/25/15/155901

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Cubic-tetragonal phase transitions of [100]-oriented BaTiO3 crystals have been studied by means of an acoustic emission (AE) method, under an external electric field. The Curie temperature (T-c) reveals a nontrivial behavior at the small field, namely, it initially decreases with enhancement of the field, attains a minimum at the threshold field E-th = 0.256 kV cm(-1), accompanied by the AE count rate (N) over dot approximate to 9 s(-1), and then starts increasing with a rate of 1.5 K m kV(-1) as the field is enhanced. Such nontrivial behavior of T-c is explained as due to the presence of polar nanoregions, recently revealed in BaTiO3 crystals (Ko et al 2011 Phys. Rev. B 84 094123).

引用

页数：4

共 43 条

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