69,71Ga and 139La NMR characterisation of LaGaO3 and La1-xSrxGa1-xMgxO3-x

被引：13

作者：

Bastow, TJ

Mathews, T

Sellar, JR

机构：

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

[2] Monash Univ, Sch Phys & Mat Engn, Clayton, Vic 3168, Australia

来源：

SOLID STATE IONICS | 2004年 / 175卷 / 1-4期

关键词：

solid state NMR; doped perovskites; phase transition;

D O I：

10.1016/j.ssi.2004.09.028

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

An NMR characterisation of the perovskite LaGaO3 using the isotopes Ga-69.71 and La-139 has been used to provide, via measurement of the nuclear quadrupole interaction (NQI), an independent confirmation of the orthorhombic distortion from ideal cubic. The NMR lineshape changes consequent on doping LaGaO3 with 2, 5, 7.5 and 10 mol% of both SrO and MgO to achieve (eventually) the cubic form have been observed and interpreted in terms of a distribution of local electrical field gradients due to substitution on La and Ga sites on the Sr2+ and Mg2+ ions, respectively. Crown Copyright (C) 2004 Published by Elsevier B.V. All rights reserved.

引用

页码：129 / 133

页数：5

共 14 条

[1] Zr-91 NMR characterisation of phases in transformation toughened zirconia [J].