Magnetic ordering effects in heavily doped GaAs:Fe crystals

被引：4
|
作者：
Popov, BP [1 ]
Sobolevskii, VK [1 ]
Apushkinskii, EG [1 ]
Savel'ev, VP [1 ]
机构：
[1] St Petersburg State Polytech Univ, St Petersburg 195251, Russia
来源：
SEMICONDUCTORS | 2005年 / 39卷 / 05期
关键词：
D O I：
10.1134/1.1923553
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The exchange coupling of Fe centers in GaAs crystals is studied by electron spin resonance (ESR). Transitions to a superparamagnetic state and to an impurity ferromagnetism domain are analyzed. A study of a system of single-domain magnetically ordered regions in GaAs:Fe with the transition to a ferromagnetic state occurring at the temperature T-C1 = 460 K is described. It is shown that impurity ferromagnetism with a transition temperature T-C2 of 60 K in a disordered system of Fe centers randomly distributed among superparamagnetic regions exists in GaAs:Fe. © 2005 Pleiades Publishing, Inc.
引用
收藏
页码：493 / 498
页数：6
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