Magnetic characteristics of epitaxial Ge(Mn,Fe) diluted films -: a new room temperature magnetic semiconductor?

被引：23
|
作者：
Braak, H [1 ]
Gareev, RR [1 ]
Bürgler, DE [1 ]
Schreiber, R [1 ]
Grünberg, P [1 ]
Schneider, CM [1 ]
机构：
[1] Forschungszentrum Julich, Inst Festkorperforsch, D-52425 Julich, Germany
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2005年 / 286卷
关键词：
magnetic semiconductor; molecular beam epitaxy; germanium;
D O I：
10.1016/j.jmmm.2004.09.034
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We prepare 100 nm thick, epitaxial Ge100-(x+y)(MnxFey) diluted films with Mn and Fe concentrations of several at% using a layer-by-layer deposition scheme at elevated temperature. We measure saturation magnetization m(s) versus temperature curves for a variety of (x,y) combinations and find for fixed temperatures a non-trivial dependence of ms on x and y. Within a certain window in the (x,y) parameter space Ge100-(x+y)(Mn-x,Fe-y) exhibits a Curie temperature of 350 K and m(s) approximate to 10 emu/cm(2) at room temperature. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：46 / 50
页数：5
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