Electric field-induced modification of magnetocrystalline anisotropy in transition-metal films and at metal-insulator interfaces

K. Nakamura, T. Akiyama, T. Ito, M. Weinert, A. J. Freeman

Research output: Contribution to journalArticle

6 Citations (Scopus)

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 Fe0.75Co0.25. For the Fe/MgO interfaces, the ideal Fe/MgO interface gives rise to a large out-ofplane 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.

Original languageEnglish
Pages (from-to)161-163
Number of pages3
JournalJournal of Magnetics
Volume16
Issue number2
DOIs
Publication statusPublished - Jul 11 2011

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Keywords

  • External electric field
  • First principles calculations
  • Magnetocrystalline anisotropy
  • Metal-insulator interfaces
  • Transition-metal films

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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