Electric Field-Induced Modification of Magnetocrystalline Anisotropy in Transition-metal Films and at Metal-Insulator Interfaces

被引：6
作者：
Nakamura, K. [1 ]
Akiyama, T. [1 ]
Ito, T. [1 ]
Weinert, M. [2 ]
Freeman, A. J. [3 ]
机构：
[1] Mie Univ, Dept Engn Phys, Tsu, Mie 5148507, Japan
[2] Univ Wisconsin, Dept Phys, Milwaukee, WI 53201 USA
[3] Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA
来源：
JOURNAL OF MAGNETICS | 2011年 / 16卷 / 02期
基金：
日本学术振兴会;
关键词：
magnetocrystalline anisotropy; external electric field; transition-metal films; metal-insulator interfaces; first principles calculations; ENERGY; IRON; SURFACES;
D O I：
10.4283/JMAG.2011.16.2.161
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report results of first principles calculations for effects of an external electric field (E-field) on the magnetocrystalline anisotropy (MCA) in transition-metal (Fe, Co, and Ni) monolayers and at metal-insulator (Fe/MgO) interfaces by means of full-potential linearized augmented plane wave method. For the monolayers, the MCA in the Fe monolayer (but not in the Co and Ni) is modified by the E-field, and a giant modification is achieved in the Fe(0.75)Co(0.25). For the Fe/MgO interfaces, the ideal Fe/MgO interface gives rise to a large out-of-plane MCA, and a MCA modification is induced when an E-field is introduced. However, the existence of an interfacial FeO layer between the Fe layer and the MgO substrate may play a key role in demonstrating an E-field-driven MCA switching, i.e., from out-of-plane MCA to in-plane MCA.
引用
收藏
页码：161 / 163
页数：3
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