First Principles Calculation of Magnetocrystalline Anisotropy Energy of MnBi and MnBi
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概要
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We calculated the magnetic anisotropy constant K_{\text{u}} of MnBi using a first principles approach, and obtained a negative K_{\text{u}} in agreeable with experimental results. Furthermore, we also found a band filling dependence indicating that a slight decrease in the valence electron number will change K_{\text{u}} from negative to positive. When some of the Bi is replaced with Sn to decrease the valence electron number, the K_{\text{u}} value of MnBi<inf>1-x</inf>Sn<inf>x</inf>drastically changes to a positive value, K_{\text{u}}\sim 2 MJ/m<sup>3</sup>, for x>0.05.
- 2013-07-15
著者
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Sakuma Akimasa
Department Of Applied Physics Graduate School Of Engineering Tohoku University
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Kota Yohei
Department of Applied Physics, Tohoku University, Sendai 980-8579, Japan
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Manabe Yuki
Department of Applied Physics, Tohoku University, Sendai 980-8579, Japan
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