Ferromagnetism on a paramagnetic host background in cobalt-doped Bi2Se3 topological insulator

doi:10.1088/1674-1056/23/7/076104

›› 2014, Vol. 23 ›› Issue (7): 76104-076104.doi: 10.1088/1674-1056/23/7/076104

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇下一篇

Ferromagnetism on a paramagnetic host background in cobalt-doped Bi₂Se₃ topological insulator

张敏^a, 吕莉^a, 魏占涛^a, 羊新胜^a, 赵勇^{a b}

a Key Laboratory of Advanced Technology of Materials of Ministry of Education, Superconductor and New Energy R&D Center, Southwest Jiaotong University, Chengdu 610031, China;
b Superconductivity Research Group, School of Materials and Engineering, University of New South Wale, Sydney, 2052 NSW, Australia

收稿日期:2013-11-10 修回日期:2014-01-22 出版日期:2014-07-15 发布日期:2014-07-15
基金资助:
Project supported by the Program of International S&T Cooperation (Grant No. 2013DFA51050), the National Magnetic Confinement Fusion Science Program of China (Grant No. 2011GB112001), the Science Foundation of Sichuan Province, China (Grant Nos. 2011JY0031 and 2011JY0130), the National Natural Science Foundation of China (Grant Nos. 51271155 and 51002125), and the Fundamental Research Funds for the Central Universities of China (Grant Nos. SWJTU2682013CX005 and SWJTU12CX018).

Ferromagnetism on a paramagnetic host background in cobalt-doped Bi₂Se₃ topological insulator

Zhang Min (张敏)^a, Lü Li (吕莉)^a, Wei Zhan-Tao (魏占涛)^a, Yang Xin-Sheng (羊新胜)^a, Zhao Yong (赵勇)^{a b}

a Key Laboratory of Advanced Technology of Materials of Ministry of Education, Superconductor and New Energy R&D Center, Southwest Jiaotong University, Chengdu 610031, China;
b Superconductivity Research Group, School of Materials and Engineering, University of New South Wale, Sydney, 2052 NSW, Australia

Received:2013-11-10 Revised:2014-01-22 Online:2014-07-15 Published:2014-07-15
Contact: Yang Xin-Sheng E-mail:xsyang@swjtu.edu.cn
About author:61.72.U-; 75.50.Gg; 75.50.Pp
Supported by:
Project supported by the Program of International S&T Cooperation (Grant No. 2013DFA51050), the National Magnetic Confinement Fusion Science Program of China (Grant No. 2011GB112001), the Science Foundation of Sichuan Province, China (Grant Nos. 2011JY0031 and 2011JY0130), the National Natural Science Foundation of China (Grant Nos. 51271155 and 51002125), and the Fundamental Research Funds for the Central Universities of China (Grant Nos. SWJTU2682013CX005 and SWJTU12CX018).

摘要/Abstract

摘要： Cobalt-doped Bi₂Se₃ topological insulators have been grown though melt-grown reaction. The Bi₂Se₃ matrix is diamagnetic and doped sample is a superposition of ferromagnetism (FM) and paramagnetism (PM) behavior at low temperature. The values of M_Smol, H_c, and M_r increase as the Co concentration increases. Two possible explanations have been proposed for the origin of ferromagnetism in Co-doped Bi₂Se₃. One is the magnetic ordering from nanoclusters of Co-Se compound in the crystals, and the other is Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction between magnetic impurities.

关键词: topological insulator (TI), ferromagnetism, Bi₂Se₃

Abstract: Cobalt-doped Bi₂Se₃ topological insulators have been grown though melt-grown reaction. The Bi₂Se₃ matrix is diamagnetic and doped sample is a superposition of ferromagnetism (FM) and paramagnetism (PM) behavior at low temperature. The values of M_Smol, H_c, and M_r increase as the Co concentration increases. Two possible explanations have been proposed for the origin of ferromagnetism in Co-doped Bi₂Se₃. One is the magnetic ordering from nanoclusters of Co-Se compound in the crystals, and the other is Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction between magnetic impurities.

Key words: topological insulator (TI), ferromagnetism, Bi₂Se₃

中图分类号: (Doping and impurity implantation)

61.72.U-

75.50.Gg (Ferrimagnetics) 75.50.Pp (Magnetic semiconductors)

张敏, 吕莉, 魏占涛, 羊新胜, 赵勇. Ferromagnetism on a paramagnetic host background in cobalt-doped Bi₂Se₃ topological insulator[J]. , 2014, 23(7): 76104-076104.

Zhang Min (张敏), Lü Li (吕莉), Wei Zhan-Tao (魏占涛), Yang Xin-Sheng (羊新胜), Zhao Yong (赵勇). Ferromagnetism on a paramagnetic host background in cobalt-doped Bi₂Se₃ topological insulator[J]. Chin. Phys. B, 2014, 23(7): 76104-076104.

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Ferromagnetism on a paramagnetic host background in cobalt-doped Bi₂Se₃ topological insulator

Ferromagnetism on a paramagnetic host background in cobalt-doped Bi₂Se₃ topological insulator

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