Raman scattering and magnetizations studies of (Al, Cr)-codoped 4H-SiC

doi:10.1016/j.jmmm.2011.06.044

CORC > 北京大学 > 化学与分子工程学院

	Raman scattering and magnetizations studies of (Al, Cr)-codoped 4H-SiC
	Song, B. ; Chen, X. L. ; Han, J. C. ; Wang, G. ; Bao, H. Q. ; Duan, L. B. ; Zhu, K. X. ; Li, H. ; Zhang, Z. H. ; Wang, W. Y. ; Wang, W. J. ; Zhang, X. H. ; Meng, S. H.
刊名	磁学和磁性材料杂志
	2011
关键词	Ferromagnetic SiC Codoped HIGH-TEMPERATURE FERROMAGNETISM 6H-SIC SINGLE-CRYSTALS MAGNETIC-PROPERTIES DOPED ALN SILICON-CARBIDE ZINC-OXIDE THIN-FILMS MN GROWTH SEMICONDUCTORS
DOI	10.1016/j.jmmm.2011.06.044
英文摘要	In this study, the insertion of both Al and Cr atoms into SiC matrix has been experimentally evidenced by X-ray diffraction, Raman scattering, elements analysis and magnetic measurements. Structure analysis showed that (Al, Cr)-codoped SiC has a single-phase 4H-crystal structure and no trace of any other impurity phases were detected. Raman scattering showed that several new features appeared in (Al, Cr)-codoped 4H-SiC: (1) the vanishing of the folded longitudinal-optical phonons modes-plasmon coupling (FLOPC) modes with x=(q/q(B))=0; (2) an obvious absorbing peak was found in Si1-x-yAlxCryC with y=0.0203 at%; (3) folded transverse-optical (FTO) mode shifts to high frequency and linewidths [full widths at half maximum (FWHM)] decrease with increase in Cr content. Magnetic properties characterizations showed that weak ferromagnetism order is established. With increase in Cr content, the magnetization decreased. No clear influence of Al doping on the magnetic properties of codoped 4H-SiC is evidenced while the magnetic origin should be ascribed to be induced by Cr. It is speculated that doping Cr elements at Si sites destroy the effective coupling of the spins induced by Al doping. The major role of Al is to stabilize the codoped crystal structure as 4H-single-phase. (C) 2011 Elsevier B.V. All rights reserved.; Materials Science, Multidisciplinary; Physics, Condensed Matter; SCI(E); EI; 10; ARTICLE; 22; 2876-2882; 323
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/238022]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Song, B.,Chen, X. L.,Han, J. C.,et al. Raman scattering and magnetizations studies of (Al, Cr)-codoped 4H-SiC[J]. 磁学和磁性材料杂志,2011.
APA	Song, B..,Chen, X. L..,Han, J. C..,Wang, G..,Bao, H. Q..,...&Meng, S. H..(2011).Raman scattering and magnetizations studies of (Al, Cr)-codoped 4H-SiC.磁学和磁性材料杂志.
MLA	Song, B.,et al."Raman scattering and magnetizations studies of (Al, Cr)-codoped 4H-SiC".磁学和磁性材料杂志 (2011).