Giant Modification of the Magnetocrystalline Anisotropy in Transition-Metal Monolayers by an External Electric Field
Giant Modification of the Magnetocrystalline Anisotropy in Transition-Metal Monolayers by an External Electric Field
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DOI：
10.1103/physrevlett.102.187201
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发表时间：
2009-05-08
影响因子：
8.6
通讯作者：
Freeman, A. J.
中科院分区：
文献类型：
--
作者：
Nakamura, Kohji;Shimabukuro, Riki;Freeman, A. J.
通过外加电场控制和设计量子磁性质是现代磁物理学的一个关键挑战。本文从第一性原理出发，证明了外电场对铁磁过渡金属单层膜中磁晶各向异性的影响。结果表明，Fe（001）单层膜中的磁晶各向异性可由电场通过改变能带结构来控制，而Co（001）和Ni（001）单层膜中的磁晶各向异性则不受影响。其通过电场耦合到d态，起到关键作用。这一预测结果为通过电场控制MCA开辟了一条道路，并邀请进行实验。
Controlling and designing quantum magnetic properties by an external electric field is a key challenge in modern magnetic physics. Here, from first principles, the effects of an external electric field on the magnetocrystalline anisotropy (MCA) in ferromagnetic transition-metal monolayers are demonstrated which show that the MCA in an Fe(001) monolayer [but not in Co(001) and Ni(001) monolayers] can be controlled by the electric field through a change in band structure, in which small components of the p orbitals near the Fermi level, which are coupled to the d states by the electric field, play a key role. This prediction obtained opens a way to control the MCA by the electric field and invites experiments.