Studies of the local order parameter of Ni3+ impurities in the tetragonal phase of Rb1-xCsxCaF3 mixed crystals

被引：1

作者：

Zheng, WC ^{[1
]}

Wu, SY

Dong, HL

机构：

[1] Sichuan Univ, Dept Mat Sci, Chengdu 610064, Peoples R China

[2] Acad Sinica, Int Ctr Mat Phys, Shenyang 110015, Peoples R China

[3] Sichuan Univ, Key Lab Radiat Phys & Technol, Minist Educ China, Chengdu 610064, Peoples R China

[4] Sichuan Normal Univ, Inst Solid State Phys, Chengdu 610066, Peoples R China

来源：

PHYSICA B-CONDENSED MATTER | 2002年 / 322卷 / 1-2期

关键词：

local phase-transition behaviour; electron paramagnetic resonance (EPR); Ni3-; Rb1-xCsxCaF3 mixed perovskite;

D O I：

10.1016/S0921-4526(02)00602-6

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

By studying the anisotropy of EPR g factors (characterized by Deltag = g(perpendicular to) - g(\)) for Ni3+ ions created by X-ray irradiation of nickel-doped Rb1-xCsxCaF3 mixed perovskites in cubic-to-tetragonal phase transition, the local order parameters phi with x = 0.1, 0.21, 0.27 and 0.35 in the tetragonal phase (T = 25 K) are obtained. From the evaluation of phi with x and the expression phi = phi(0)\T - T-C\(beta), it is found that the decrease of phi with increasing concentration x is due mainly to the decreases of T-C and phi(0) with increasing concentration x. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：80 / 83

页数：4

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