New dielectric resonances in mesoscopic ferroelectrics

被引：48

作者：

Pattnaik, R

Toulouse, J

机构：

[1] Physics Department, Lehigh University, Bethlehem, PA

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 79卷 / 23期

关键词：

D O I：

10.1103/PhysRevLett.79.4677

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A new type of dielectric resonance has been observed in several mixed ferroelectrics, KTa1-xNbxO3 (KTN), K1-xLixTaO3 (KLT), and PbMg1/3Nb2/3O3 (PMN), also known as relaxer ferroelectrics. This resonance and its metastability (persistence over long periods of time) in KTN in the paraelectric phase provides clear evidence, in relaxors, for the presence of permanent polar nanoregions and strong polarization-strain coupling. The frequencies calculated from the elastic constant reveal the unexpected clamped nature of the resonance. These results point to the essential role of polar regions in the relaxer behavior.

引用

页码：4677 / 4680

页数：4

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