NMR evidence for the coexistence of order-disorder and displacive components in barium titanate

被引：257

作者：

Zalar, B ^{[1
]}

Laguta, VV ^{[1
]}

Blinc, R ^{[1
]}

机构：

[1] Univ Ljubljana, Jozef Stefan Inst, Ljubljana 1000, Slovenia

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 90卷 / 03期

关键词：

D O I：

10.1103/PhysRevLett.90.037601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A quadrupole coupling induced Ti-47 and Ti-49 satellite background which transforms into well-defined satellite lines below T-c in the ferroelectric phase has been observed in the cubic phase of an ultrapure BaTiO3 single crystal. The results demonstrate the coexistence of a displacive and order-disorder component in the phase transition mechanism and tetragonal breaking of the cubic symmetry due to biased Ti motion between off-center sites in the paraelectric phase above T-c.

引用

页数：4

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