Role of the nonmagnetic layer in determining the Landé g -factor in a spin-transfer system

J. S. Lee, E. Vescovo, C. C. Kao, J. M. Beaujour, A. D. Kent, H. Jang, J. Y. Kim, J. H. Park, J. H. Shim

    Research output: Contribution to journalArticle

    Abstract

    The microscopic origin of the Landé g -factor in two ferromagnetic/nonmagnetic (FM/NM) bilayer systems-Co/Cu and Ni/Pd-has been investigated using x-ray magnetic circular dichroism, resonant magnetic reflectivity, and band calculations. The FM/NM bilayer represents the building block of any complete spin-transfer structure (FM1/NM/FM2). The valence electronic structure is profoundly altered over a finite length across the FM/NM interface. A considerable charge transfer takes place from the NM to the FM material. This results in an enhancement of the orbital-to-spin magnetic moment ratio in the FM layer and an induced magnetic polarization in the NM layer. Both effects turn out to be crucial for a correct understanding of the g -factor in spin-transfer systems.

    Original languageEnglish (US)
    Article number180403
    JournalPhysical Review B - Condensed Matter and Materials Physics
    Volume80
    Issue number18
    DOIs
    StatePublished - Nov 2 2009

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics

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