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http://dx.doi.org/10.4283/JMAG.2011.16.2.161

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

Nakamura, K. (Department of Physics Engineering, Mie University)
Akiyama, T. (Department of Physics Engineering, Mie University)
Ito, T. (Department of Physics Engineering, Mie University)
Weinert, M. (Department of Physics, University of Wisconsin-Milwaukee)
Freeman, A.J. (Department of Physics and Astronomy, Northwestern University)
Publication Information
Journal of Magnetics / v.16, no.2, 2011 , pp. 161-163 More about this Journal
Abstract
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 Efield-driven MCA switching, i.e., from out-of-plane MCA to in-plane MCA.
Keywords
magnetocrystalline anisotropy; external electric field; transition-metal films; metal-insulator interfaces; first principles calculations;
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