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	Two opposite gradients of hole density in as-grown and annealed (ga,mn)as layers
	Deng, J. J.; Zhao, J. H.; Tan, P. H.; Bi, J. F.; Gan, H. D.; Niu, Z. C.; Wu, X. G.
刊名	Journal of magnetism and magnetic materials
	2007
卷号	308期号:2页码:313-317
关键词	Magnetic semiconductors Electrical and magnetic properties (related to treatment conditions) Raman spectra Molecular-beam epitaxy
ISSN号	0304-8853
DOI	10.1016/j.jmmm.2006.06.007
通讯作者	Zhao, j. h.(jhzhao@red.semi.ac.cn)
英文摘要	The depth distribution of the hole density p in 500 nm-thick (ga,mn)as layers is investigated. from raman scattering spectra, it is found that the gradients of p are opposite in the as-grown and annealed layers. at the region around the free surface, with increasing etching depth, p significantly increases in the as-grown layer; however, p decreases distinctly in the annealed layer. then, in the bulk, p becomes almost homogeneous for both cases. the etching-depth dependence of curie temperature obtained from magnetic measurements is in agreement with the distribution characterization of p. these results suggest that annealing induces outdiffusion of mn interstitials towards the free surface, and incomplete outdiffusion during the growth leads to an accumulation of mn interstitials around the free surface of the as-grown (ga,mn)as. (c) 2006 elsevier b.v. all rights reserved.
WOS关键词	CURIE-TEMPERATURE ; GA1-XMNXAS ; SEMICONDUCTORS ; FERROMAGNETISM ; EPILAYERS
WOS研究方向	Materials Science ; Physics
WOS类目	Materials Science, Multidisciplinary ; Physics, Condensed Matter
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000241713600020
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2426942
专题	半导体研究所
通讯作者	Zhao, J. H.
作者单位	Chinese Acad Sci, Inst Semicond, State Key Lab Superlattices & Microstruct, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Deng, J. J.,Zhao, J. H.,Tan, P. H.,et al. Two opposite gradients of hole density in as-grown and annealed (ga,mn)as layers[J]. Journal of magnetism and magnetic materials,2007,308(2):313-317.
APA	Deng, J. J..,Zhao, J. H..,Tan, P. H..,Bi, J. F..,Gan, H. D..,...&Wu, X. G..(2007).Two opposite gradients of hole density in as-grown and annealed (ga,mn)as layers.Journal of magnetism and magnetic materials,308(2),313-317.
MLA	Deng, J. J.,et al."Two opposite gradients of hole density in as-grown and annealed (ga,mn)as layers".Journal of magnetism and magnetic materials 308.2(2007):313-317.

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