Spin-dependent surface screening in ferromagnets and magnetic tunnel junctions

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Abstract

The spin dependence of the electron screening on the surface of ferromagnets and magnetic tunnel junctions was examined as a function of the electric field. The relationship between the surface screening and the Coulomb/exchange interactions were analyzed, and an integrodifferential equation which represents the induced surface charge and magnetization buildup was derived. The resulting equation was solved for a magnetic tunnel junction by local response approximation, and the nonequilibrium charge and magnetization buildups were estimated for Ni, Co, and Fe.

Original languageEnglish (US)
Pages (from-to)640-643
Number of pages4
JournalPhysical Review Letters
Volume83
Issue number3
Publication statusPublished - Jul 19 1999
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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