Observation of Nanoscale Ferroelectric Domains Using Super-Higher-Order Nonlinear Dielectric Microscopy

被引：3

作者：

Chinone, Norimichi ^{[1
]}

Yamasue, Kohei ^{[1
]}

Hiranaga, Yoshiomi ^{[1
]}

Cho, Yasuo ^{[1
]}

机构：

[1] Tohoku Univ, Res Inst Elect Commun, Sendai, Miyagi 9808577, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2012年 / 51卷 / 09期

基金：

日本学术振兴会;

关键词：

SCANNING-TUNNELING-MICROSCOPY; POLARIZATION REVERSAL; FORCE MICROSCOPY; SURFACE; LITAO3; FILMS;

D O I：

10.1143/JJAP.51.09LE07

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Scanning nonlinear dielectric microscopy is a powerful technique for measuring the domain structure of ferroelectrics. We observed congruent LiTaO3 and found the marked enhancement of nonlinear dielectric "constants" when the applied tip-sample voltage exceeded a particular threshold value. This is due to domain nucleation activated by a huge electric field under the tip. Moreover, low frequencies (less than a few hundred Hz) did not enhance the nonlinearity. An effectively lower electric field caused by ion conduction in the sample under the tip is a possible reason for the frequency-dependent characteristics of the enhanced nonlinearity for the applied voltage. (c) 2012 The Japan Society of Applied Physics

引用

页数：5

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