期刊
JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS
卷 45, 期 12-16, 页码 L416-L418出版社
JAPAN SOC APPLIED PHYSICS
DOI: 10.1143/JJAP.45.L416
关键词
dilute magnetic semiconductor; spinodal decomposition; layer by layer growth; one-dimensional structure; super-paramagnetism; blocking phenomena; magnetic anisotropy; dipole-dipole interaction
We show that spinodal decomposition under layer by layer crystal growth condition leads to characteristic quasi-one-dimensional nano-structures in dilute magnetic semiconductors (DMS). It is found that the DMS systems can form rather large clusters with highly anisotropic shape even for low concentrations. It is suggested that the blocking phenomena in the super-paramagnetism, the magnetic dipole-dipole interaction and the network of the one-dimensional structures should be considered to understand the magnetism in DMS. Based on the present simulations, we propose that the delta-doping method can be effective approach to realize high Curie temperature.
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