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
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.
View original:
http://arxiv.org/abs/1302.0371
No comments:
Post a Comment