COUPLED WEAK FERROMAGNETIC PARAMAGNETIC EXCITATIONS IN (GD0.5EU0.5)2CUO4

被引：13

作者：

FAINSTEIN, A

TOVAR, M

FISK, Z

机构：

[1] CSIC,INST CIENCIA MAT,E-08193 BARCELONA,SPAIN

[2] UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87544

[3] INST BALSEIRO,RA-8400 BARILOCHE,RIO NEGRO,ARGENTINA

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1992年 / 4卷 / 06期

关键词：

D O I：

10.1088/0953-8984/4/6/024

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The electron paramagnetic resonance spectra of Gd3+ in single crystals of (GD0.5Eu0.5)2CuO4 show an anomalous anisotropy for temperatures below the magnetic ordering of the Cu ions (T congruent-to 280 K). We have performed a detailed experimental study of this feature, and we discuss our results in terms of a model that assumes a weak Heisenberg interaction between Cu and Gd moments. We show that that anisotropy is a consequence of the dynamic coupling of the Gd3+ paramagnetic mode with a weak ferromagnetic mode originating in the Cu magnetic moments.

引用

页码：1581 / 1593

页数：13

共 22 条

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