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国家自然科学基金(s51271155)

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Ferromagnetism on a paramagnetic host background in cobalt-doped Bi_2Se_3 topological insulator
2014年
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 tem- perature. The values of Msmol, Hc, and Mr 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.
张敏吕莉魏占涛羊新胜赵勇
关键词:FERROMAGNETISM
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