Paramagnetic regime in Zn1-xMnxGeAs2 diluted magnetic semiconductor

被引：9

作者：

Kilanski, L. ^{[1
]}

Fedorchenko, I. V. ^{[4
]}

Gorska, M. ^{[1
]}

Dynowska, E. ^{[1
]}

Wojcik, M. ^{[1
]}

Kowalski, B. J. ^{[1
]}

Anderson, J. R. ^{[2
,3
]}

Rotundu, C. R. ^{[2
,3
]}

Varnavskiy, S. A. ^{[4
]}

Dobrowolski, W. ^{[1
]}

Marenkin, S. F. ^{[4
]}

机构：

[1] Polish Acad Sci, Inst Phys, PL-02668 Warsaw, Poland

[2] Univ Maryland, Dept Phys, College Pk, MD 20742 USA

[3] Univ Maryland, Ctr Nanophys & Adv Mat, College Pk, MD 20742 USA

[4] Kurnakov Inst Gen & Inorgan Chem RAS, Moscow 119991, Russia

来源：

PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS | 2011年 / 248卷 / 07期

关键词：

diluted magnetic semiconductors; electron transport; exchange interactions; magnetic properties; ANOMALIES;

D O I：

10.1002/pssb.201001101

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The systematic studies of both magnetic and magnetotransport properties of Zn0.947Mn0.053GeAs2 diluted magnetic semiconductor are presented. The paramagnetic behaviour of the sample confirms that the solubility of Mn in the studied alloy is of the order of 5 at%. The Curie-Weiss behaviour of magnetic susceptibility is preserved only at low temperatures, T < 100K indicating the presence of short-range magnetic interactions in the system due to the presence of groups of Mn counting few ions. The high-field magnetization together with magneto-resistance data is used to estimate the amount of magnetic ions active in the semiconductor matrix. The obtained results showed that the amount of magnetically active Mn ions in the semiconductors matrix is two orders of magnitude lower than the value obtained from X-ray fluorescence measurements. The magnetotransport studies revealed that only about 30% of all Mn ions are electrically active in the semiconductor matrix. (C) 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

引用

页码：1601 / 1604

页数：4

共 11 条

[1]

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