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

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$μ$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.

preprint2013arXivOpen access
H. LiY. R. SongMeng-Yu YaoFengfeng ZhuCanhua LiuC. L. GaoJin-Feng JiaDong QianX. YaoY. J. ShiD. Wu
cond-mat.mtrl-sci
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H. LiY. R. SongMeng-Yu YaoFengfeng ZhuCanhua LiuC. L. GaoJin-Feng JiaDong QianX. YaoY. J. ShiD. Wu

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