Electric-Field-Induced Modification of the Magnon Energy, Exchange Interaction, and Curie Temperature of Transition-Metal Thin Films

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

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Abstract

The electric-field-induced modification in the Curie temperature of prototypical transition-metal thin films with the perpendicular magnetic easy axis, a freestanding Fe(001) monolayer and a Co monolayer on Pt(111), is investigated by first-principles calculations of spin-spiral structures in an external electric field (E field). An applied E field is found to modify the magnon (spin-spiral formation) energy; the change arises from the E-field-induced screening charge density in the spin-spiral states due to p-d hybridizations. The Heisenberg exchange parameters obtained from the magnon energy suggest an E-field-induced modification of the Curie temperature, which is demonstrated via Monte Carlo simulations that take the magnetocrystalline anisotropy into account.

Original languageEnglish
Article number107202
JournalPhysical review letters
Volume114
Issue number10
DOIs
Publication statusPublished - Mar 13 2015

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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