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arXiv · 1302.0371

Carrier density dependence of the magnetic properties in iron-doped Bi2Se3 topological insulator

H. Li·Y. R. Song·Meng-Yu Yao·Fengfeng Zhu·Canhua Liu·C. L. Gao·Jin-Feng Jia·Dong Qian·X. Yao·Y. J. Shi·D. Wu
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Abstract

The electronic and magnetic properties of iron-doped topological insulator Bi1.84-xFe0.16CaxSe3 single crystals were studied. By co-doping Fe and Ca atoms, ferromagnetic bulk states with different carrier density (from n-type to p-type) were obtained. Effective magnetic moments for each Fe atom was estimated as small as about 0.07$\mu$B. Magnetic and non-magnetic phases separation was observed in all samples. Our results suggest that the bulk ferromagnetism in Fe-doped Bi2Se3 is not intrinsic and regardless of carrier density.

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H. Li, Y. R. Song, Meng-Yu Yao, Fengfeng Zhu, Canhua Liu, C. L. Gao, Jin-Feng Jia, Dong Qian, X. Yao, Y. J. Shi, D. Wu. 2013-02-02. Carrier density dependence of the magnetic properties in iron-doped Bi2Se3 topological insulator. https://doi.org/10.1063/1.4788834

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