SPIN-LATTICE COEFFICIENTS FOR GD3+ AND EU2+ IN CAF2 AND FOR GD3+ IN CAO

被引：50

作者：

CALVO, R

ISAACSON, RA

SROUBEK, Z

机构：

[1] University of California, San Diego, San Diego

[2] University of California, Los Angeles

[3] Centro Atomico Bariloche, San Carlos de Bariloche (R. N.)

[4] Institute of Radio Engineering and Electronics, Czechoslovak Academy of Science, Prague

来源：

PHYSICAL REVIEW | 1969年 / 177卷 / 02期

关键词：

D O I：

10.1103/PhysRev.177.484

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have measured the spin-lattice coefficients of Eu2+ and Gd3+ in CaF2 and Gd3+ in CaO by studying the effect of uniaxial stress on the EPR spectra of these ions. The experimental data show that fourth-order terms in the spin-lattice Hamiltonian give significant contributions. The values of the second-order spin-lattice coefficients are given, and the fourth-order contribution is tentatively identified as due to the change of the cubic field splitting with stress. From the value of the fourth-order coefficient, we conclude that at least half of the temperature dependence of the cubic field parameter is due to the effect of the lattice expansion. © 1969 The American Physical Society.

引用

页码：484 / &

共 29 条

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