| Structure and Magnetic Properties of （In,Mn）As Based Core-Shell Nanowires Grown on Si（111） by Molecular-Beam Epitaxy |
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| 引用本文： | 潘东,;王思亮,;王海龙,;俞学哲,;王晓蕾,;赵建华.Structure and Magnetic Properties of （In,Mn）As Based Core-Shell Nanowires Grown on Si（111） by Molecular-Beam Epitaxy[J].中国物理快报,2014(7):205-209. |
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| 作者姓名： | 潘东 ;王思亮 ;王海龙 ;俞学哲 ;王晓蕾 ;赵建华 |
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| 作者单位： | [1]State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors Chinese Academy of Sciences, Beijing 100083; [2]Central Research Academy of Dongfang Electric Corporation, Chengdu 611731 |
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| 基金项目： | Supported by the National Basic Research Program of China under Grant No 2012CB932701, and the National Natural Science Foundation of China under Grant No 11127406.
The authors are grateful to L. J. Zhu, S. H. Nie and K. K. Meng for their help on sample growth and M. F. Wang in Tsinghua University for their assistance in TEM measurements. |
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| 摘 要： | 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 In As nanowires with a mixture ofwurtzite 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.
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| 关 键 词： | Si(111) 分子束外延生长 闪锌矿结构 纳米线 核壳 透射电子显微镜 磁性 锰 |
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