Room-temperature ferromagnetism with high magnetic moment in Cu-doped AlN single crystal whiskers

doi:10.1088/1674-1056/24/2/027503

中国物理B ›› 2015, Vol. 24 ›› Issue (2): 27503-027503.doi: 10.1088/1674-1056/24/2/027503

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

Room-temperature ferromagnetism with high magnetic moment in Cu-doped AlN single crystal whiskers

姜良宝, 刘宇, 左思斌, 王文军

Research & Development Center for Functional Crystals, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

收稿日期:2014-06-20 修回日期:2014-10-20 出版日期:2015-02-05 发布日期:2015-02-05
基金资助:
Project supported by the National Basic Research Program of China (Grant No. 2013CB932901), the National Natural Science Foundation of China (Grant Nos. 51372267, 51210105026, and 51172270), the Funds from the Chinese Academy of Sciences, the International Centre for Diffraction Data, USA (2013 Ludo Frevel Crystallography Scholarship Award), and the Funds from the Ministry of Education of China (2012 Academic Scholarship Award for Doctoral Candidates).

Room-temperature ferromagnetism with high magnetic moment in Cu-doped AlN single crystal whiskers

Jiang Liang-Bao (姜良宝), Liu Yu (刘宇), Zuo Si-Bin (左思斌), Wang Wen-Jun (王文军)

Research & Development Center for Functional Crystals, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

Received:2014-06-20 Revised:2014-10-20 Online:2015-02-05 Published:2015-02-05
Contact: Wang Wen-Jun E-mail:wjwang@aphy.iphy.ac.cn
Supported by:
Project supported by the National Basic Research Program of China (Grant No. 2013CB932901), the National Natural Science Foundation of China (Grant Nos. 51372267, 51210105026, and 51172270), the Funds from the Chinese Academy of Sciences, the International Centre for Diffraction Data, USA (2013 Ludo Frevel Crystallography Scholarship Award), and the Funds from the Ministry of Education of China (2012 Academic Scholarship Award for Doctoral Candidates).

摘要/Abstract

摘要： Ferromagnetism is investigated in high-quality Cu-doped AlN single crystal whiskers. The whiskers exhibit room-temperature ferromagnetism with a magnetic moment close to the results from first-principles calculations. High crystallinity and low Cu concentrations are found to be indispensable for high magnetic moments. The difference between the experimental and theoretical moment values is explored in terms of the influence of nitrogen vacancies. The calculated results demonstrate that nitrogen vacancies can reduce the magnetic moments of Cu atom.

关键词: spintronics, defects, nitrides, first-principles calculations

Abstract: Ferromagnetism is investigated in high-quality Cu-doped AlN single crystal whiskers. The whiskers exhibit room-temperature ferromagnetism with a magnetic moment close to the results from first-principles calculations. High crystallinity and low Cu concentrations are found to be indispensable for high magnetic moments. The difference between the experimental and theoretical moment values is explored in terms of the influence of nitrogen vacancies. The calculated results demonstrate that nitrogen vacancies can reduce the magnetic moments of Cu atom.

Key words: spintronics, defects, nitrides, first-principles calculations

中图分类号: (Studies of specific magnetic materials)

75.50.-y

71.55.-i (Impurity and defect levels) 61.72.uj (III-V and II-VI semiconductors) 71.15.Mb (Density functional theory, local density approximation, gradient and other corrections)

姜良宝, 刘宇, 左思斌, 王文军. Room-temperature ferromagnetism with high magnetic moment in Cu-doped AlN single crystal whiskers[J]. 中国物理B, 2015, 24(2): 27503-027503.

Jiang Liang-Bao (姜良宝), Liu Yu (刘宇), Zuo Si-Bin (左思斌), Wang Wen-Jun (王文军). Room-temperature ferromagnetism with high magnetic moment in Cu-doped AlN single crystal whiskers[J]. Chin. Phys. B, 2015, 24(2): 27503-027503.

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Room-temperature ferromagnetism with high magnetic moment in Cu-doped AlN single crystal whiskers

Room-temperature ferromagnetism with high magnetic moment in Cu-doped AlN single crystal whiskers

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