Ferromagnetic nature of (Ga, Cr)As epilayers revealed by magnetic circular dichroism

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	Ferromagnetic nature of (Ga, Cr)As epilayers revealed by magnetic circular dichroism
	Wu H ; Gan HD ; Zheng HZ ; Lu J ; Zhu H ; Ji Y ; Li GR ; Zhao JH
刊名	solid state communications
	2011
卷号	151 期号:6 页码:456-459
关键词	Magnetic semiconductors Molecular beam epitaxy Magneto-optical effects TRANSPORT-PROPERTIES SEMICONDUCTOR (GA,CR)AS
ISSN号	0038-1098
通讯作者	zheng, hz, chinese acad sci, inst semicond, state key lab superlattices & microstruct, pob 912, beijing 100083, peoples r china. hdgan@riec.tohoku.ac.jp ; hzzheng@red.semi.ac.cn
学科主题	半导体物理
收录类别	SCI
资助信息	national basic research program of china [2006cb932801, 2007cb924903, 2007cb924904]; chinese academy of sciences [kjcx.yw.w09]; national natural science foundation of china [60836002, 10674130, 60521001]
语种	英语
公开日期	2011-07-05 ; 2011-07-15
附注	a systematic study of magnetic circular dichroism (mcd) was carried out in a wave length range 500-960 nm for (ga1-x, cr-x)as epilayers with x = 2.38% and 4.59% grown by the low temperature molecular beam epitaxy (lt-mbe) technique. hysteresis characteristics showed up indeed in the magnetic field dependence of both mcd and magnetization measured by the superconductor quantum interference device (squid). the curie temperature of the (ga1-x, cr-x)as epilayer was determined to be about 12 k by the arrott approach. the present result provides evidences that there is strong coupling of the cr spins to the gaas host band structure in (ga1-x, cr-x)as samples. that affects the critical point of the semiconductor host, and makes the magnetization behavior in a plot of m similar to b/t (magnetic field divided by temperature) substantially different from standard superparamagnetism. (c) 2011 elsevier ltd. all rights reserved.
内容类型	期刊论文
源URL	[http://ir.semi.ac.cn/handle/172111/20899]
专题	半导体研究所_半导体超晶格国家重点实验室
推荐引用方式 GB/T 7714	Wu H,Gan HD,Zheng HZ,et al. Ferromagnetic nature of (Ga, Cr)As epilayers revealed by magnetic circular dichroism[J]. solid state communications,2011,151(6):456-459.
APA	Wu H.,Gan HD.,Zheng HZ.,Lu J.,Zhu H.,...&Zhao JH.(2011).Ferromagnetic nature of (Ga, Cr)As epilayers revealed by magnetic circular dichroism.solid state communications,151(6),456-459.
MLA	Wu H,et al."Ferromagnetic nature of (Ga, Cr)As epilayers revealed by magnetic circular dichroism".solid state communications 151.6(2011):456-459.