Magnetic interactions in diluted systems from low temperature magnetization steps

被引：12

作者：

Bindilatti, V ^{[1
]}

Oliveira, NF ^{[1
]}

terHaar, E ^{[1
]}

Shapira, Y ^{[1
]}

机构：

[1] TUFTS UNIV,DEPT PHYS & ASTRON,MEDFORD,MA 02155

来源：

CZECHOSLOVAK JOURNAL OF PHYSICS | 1996年 / 46卷

关键词：

D O I：

10.1007/BF02548138

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In diluted magnetic systems, field induced level crossings can change the magnetic moment of the ground state of spin clusters. At low enough temperatures this will lead to steps in the magnetization vs. field curves, from which a variety of information can be extracted. Using a sensitive magnetometer operating below 50 mK, we have studied: 1) the dominant antiferromagnetic exchange constant between Eu++ ions in IV-VI Diluted Magnetic Semiconductors (DMSs); 2) distant-neighbor exchange constants in II-VI DMSs; 3) crystal field parameters for Co++ ions in CdS and CdSe; 4) the distribution of Jahn-Teller distortions for Cr++ ions in ZnTe; and 5) inequivalent nearest neighbors exchange constants in Cd1-xMnxSe. Selected results and a description of the apparatus are presented.

引用

页码：3255 / 3262

页数：8

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