Elastic softening and polarization memory in PZN-PT relaxor ferroelectrics

被引：14

作者：

Farnsworth, S. M. ^{[1
]}

Kisi, E. H. ^{[1
]}

Carpenter, M. A. ^{[2
]}

机构：

[1] Univ Newcastle, Sch Engn, Callaghan, NSW 2308, Australia

[2] Univ Cambridge, Dept Earth Sci, Cambridge CB2 3EQ, England

来源：

PHYSICAL REVIEW B | 2011年 / 84卷 / 17期

基金：

澳大利亚研究理事会;

关键词：

PHASE-TRANSITIONS; PEROVSKITES; DOMAINS; SYSTEM;

D O I：

10.1103/PhysRevB.84.174124

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Substantial elastic softening in the cubic phase of PZN-PT relaxor ferroelectric crystals is observed as a large hysteresis between the RUS frequencies from poled and depoled crystals. This is due to static switchable polar nanoregions (PNR) at T*, well below the conventional Burns temperature but similar to 50 K above the ferroelectric transition. Elastic softening due to polarization of the PNR shows polarization memory through two phase transitions and is greater than the softening associated with polarization of the ferroelectric phases. This emphasizes that PNR dominate the material properties at all temperatures below T*.

引用

页数：4

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