Spin-dependent surface screening in ferromagnets and magnetic tunnel junctions

138 Scopus citations


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
Issue number3
Publication statusPublished - Jul 19 1999
Externally publishedYes


ASJC Scopus subject areas

  • Physics and Astronomy(all)

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