137Ba and 47,49Ti NMR:: electric field gradients in the non-cubic phases of BaTiO3

被引：30

作者：

Bastow, TJ

Whitfield, HJ

机构：

[1] CSIRO, Div Mfg Sci & Technol, Clayton, Vic 3169, Australia

[2] RMIT Univ, Dept Appl Phys, Melbourne, Vic 3001, Australia

来源：

SOLID STATE COMMUNICATIONS | 2001年 / 117卷 / 08期

关键词：

ferroelectrics; phase transitions; nuclear resonances;

D O I：

10.1016/S0038-1098(00)00491-9

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Electric field gradients have been measured at the Ba, and Ti sites in BaTiO3 from Ba-137 and Ti-47.49 NMR spectra of a recrystallized, strain-free polycrystalline specimen in the ferroelectric tetragonal, orthorhombic and rhombohedral phases. The strain-free nature of the recrystallized material has been established with convergent beam electron diffraction patterns and electron micrographs. The electric field gradients at the Ba and Ti sites in the rhombohedral phase are compared with recent theoretical predictions. (C) 2001 Elsevier Science Ltd. All rights reserved.

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收藏

页码：483 / 488

页数：6

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