Domain reversal in stoichiometric LiTaO3 prepared by vapor transport equilibration

被引：62

作者：

Tian, L ^{[1
]}

Gopalan, V

Galambos, L

机构：

[1] Penn State Univ, Mat Res Inst, University Pk, PA 16802 USA

[2] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA

[3] Stanford Univ, SSPL, Dept Elect Engn, Stanford, CA 94035 USA

来源：

APPLIED PHYSICS LETTERS | 2004年 / 85卷 / 19期

关键词：

D O I：

10.1063/1.1814436

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Domain reversal in stoichiometric lithium tantalate (LiTaO3) single crystals prepared by vapor transport equilibrium (VTE) method was studied. Starting from a virgin VTE crystal and using water electrodes, the coercive fields were found to be 1.39+/-0.01 kV/cm and 1.23+/-0.01 kV/cm for the first poling and the second poling, respectively, indicating a built-in internal field of 0.08 kV/cm. The spontaneous polarization, P-s was 55.2+/-0.5 muC/cm(2) and the Curie temperature was T-c=701+/-2.5degreesC. The switching time, t(s), exhibits an exponential dependence on the external field, E with activation energy of 10.84+/-0.22 kV/cm. No domain backswitching was observed. These properties are dramatically different from those of congruent and even near-stoichiometric compositions of lithium tantalate grown by Czhochralski method. (C) 2004 American Institute of Physics.

引用

页码：4445 / 4447

页数：3

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