Magnetic properties of MnAs nanocrystals embedded in GaAs

被引：6

作者：

Kwiatkowski, A. ^{[1
]}

Wasik, D. ^{[1
]}

Dluzewski, P. ^{[2
]}

Borysiuk, J. ^{[1
,3
]}

Kaminska, M. ^{[1
]}

Twardowski, A. ^{[1
]}

Sadowski, J. ^{[2
,4
]}

机构：

[1] Univ Warsaw, Inst Expt Phys, PL-00681 Warsaw, Poland

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

[3] Inst Elect Mat Technol, PL-01919 Warsaw, Poland

[4] Lund Univ, Max Lab, S-22100 Lund, Sweden

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2009年 / 321卷 / 18期

关键词：

Nanocomposite; Superparamagnet; Nanocrystal; Nanoprecipitate; DYNAMICS;

D O I：

10.1016/j.jmmm.2009.04.033

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A phenomenological model for explaining the magnetic properties of MnAs nanocrystals embedded in GaAs is proposed. It is shown that experimental data of DC magnetization as a function of temperature, obtained according to zero-field-cooled and field-cooled protocols, can be understood assuming a transition of the system from a low temperature state in which very slow dynamics is observed(frozen state) to a high-temperature state in which dynamics is fast(quasi superparamagnetic state). (C) 2009 Elsevier B. V. All rights reserved.

引用

页码：2788 / 2791

页数：4

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