Enlarged ferromagnetic hysteresis in InMnP:Be epilayers formed by thermal diffusion using MBE-grown Mn/InP:Be bilayers

Title
Enlarged ferromagnetic hysteresis in InMnP:Be epilayers formed by thermal diffusion using MBE-grown Mn/InP:Be bilayers
Authors
Yoon ShonSejoon LeeTae Won KangYoungmin LeeSeung-Woong Lee송진동김형준Jeong Ju LeeIm Taek Yoon
Keywords
Diffusion; Molecular beam epitaxy; Manganites; Magnetic materials; Semiconducting indium phosphide
Issue Date
2010-07
Publisher
Journal of crystal growth
Citation
VOL 312, NO 14, 2069-2072
Abstract
The p-type InMnP:Be epilayers, which were prepared by thermal diffusion of Mn through in-situ deposition of Mn layer using molecular beam epitaxy (MBE) onto MBE-grown InP:Be epilayers and subsequent in-situ annealing at 300–350 °C, were investigated. InMnP:Be epilayers prepared by the above sequence clearly showed the Mn-related emission band at 1.1–1.2 eV, which indicates the effective incorporation of Mn2+ ions into the host layer InP:Be. The samples demonstrated very large ferromagnetic hysteresis loops with enhanced coercivity, and the ferromagnetic-to-paramagnetic transition of the samples was observed to occur at ~85 K. These results suggest that InP-based ferromagnetic semiconductor layers having enhanced ferromagnetism can be effectively formed by the above-mentioned sequential in-situ processes.
URI
http://pubs.kist.re.kr/handle/201004/37592
ISSN
0022-0248
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