Structure and Magnetic Properties of (In,Mn)As Based Core-Shell Nanowires Grown on Si(111) by Molecular-Beam Epitaxy
PAN Dong1 , WANG Si-Liang1,2** , WANG Hai-Long1 , YU Xue-Zhe1 , WANG Xiao-Lei1 , ZHAO Jian-Hua1**
1 State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 1000832 Central Research Academy of Dongfang Electric Corporation, Chengdu 611731
Abstract ：We report the structure and magnetic properties of (In,Mn)As based core-shell nanowires grown on Si (111) by molecular-beam epitaxy. Compared to the core InAs nanowire with a flat side facet and consistent diameter, the core-shell nanowire shows a rough sidewall and an inverse tapered geometry. X-ray diffraction, transmission electron microscopy and energy-dispersive x-ray spectroscopy show that (In,Mn)As is formed on the side facets of InAs nanowires with a mixture of wurtzite and zinc-blende structures. Two ferromagnetic transition temperatures of (In,Mn)As from magnetic measurement data are observed: one is less than 25 K, which could be attributed to the magnetic phase with diluted Mn atoms in the InAs matrix, and the other is at ～300 K, which may originate from the undetectable secondary phases such as MnAs nanoclusters. The synthesis of (In,Mn)As based core-shell nanowires provides valuable information to exploit a new type of spintronic nano-materials.
出版日期: 2014-06-30
:
81.07.Gf
(Nanowires)
62.23.St
(Complex nanostructures, including patterned or assembled structures)
75.50.Pp
(Magnetic semiconductors)
75.75.Cd
(Fabrication of magnetic nanostructures)
81.15.Hi
(Molecular, atomic, ion, and chemical beam epitaxy)
引用本文:
. [J]. 中国物理快报, 2014, 31(07): 78103-078103.
链接本文:
https://cpl.iphy.ac.cn/CN/10.1088/0256-307X/31/7/078103
或
https://cpl.iphy.ac.cn/CN/Y2014/V31/I07/78103
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2014, Vol. 31 
