ELECTRON-PARAMAGNETIC-RESONANCE AND RELAXATION STUDY OF COPPER(II) AND SILVER(II) IN CSCDF3 SINGLE-CRYSTALS

被引：31

作者：

MINNER, E

LOVY, D

BILL, H

机构：

[1] Université de Genève, Département de Chimie Physique, Sciences II, 1211 Genève 4, 30, quai E. Ansermet

来源：

JOURNAL OF CHEMICAL PHYSICS | 1993年 / 99卷 / 09期

关键词：

D O I：

10.1063/1.465876

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：

Copper and silver, respectively, were introduced into single crystals of CsCdF3. Our detailed electron paramagnetic resonance (EPR) study showed that both elements enter the Cd lattice site-copper as Cu2+, silver as Ag+, which then was converted into Ag2+ by x raying the corresponding samples. Cu2+ and Ag2+ were shown to present in their ground state a pseudo-static Jahn-Teller effect. Motional effects were observed in the respective EPR spectra and studied in some detail for Cu2+ as they are seen over a wide temperature range. Predictions of a stochastic Kubo model [J. Phys. Soc. Jpn. 9, 935 (1954)] were compared with the temperature dependent linewidths of the motionally averaged EPR spectrum. A power law (T(n) with n congruent-to 1.9) was determined for the temperature dependence of the reorientation frequency between 30 and 90 K.

引用

页码：6378 / 6383

页数：6