Magnetoresistance, micromagnetism, and domain wall effects in epitaxial Fe and Co structures with stripe domains (invited)

Andrew D. Kent, Ulrich Rüdiger, Jun Yu, Luc Thomas, Stuart S.P. Parkin

    Research output: Contribution to journalConference articlepeer-review

    Abstract

    We review our recent magnetotransport and micromagnetic studies of lithographically defined epitaxial thin film structures of body-centered-cubic Fe and hexagonal-closed-packed (hcp) Co with stripe domains. Micromagnetic structure and resistivity anisotropy are shown to be the predominant sources of low field magnetoresistance (MR) in these microstructures, with domain wall (DW) effects smaller but observable (DW-MR≲1%). In Fe, at low temperature, in a regime in which fields have a significant effect on electron trajectories, a novel negative DW contribution to the resistivity is observed. In hcp Co microstructures, temperature dependent transport measurements for current perpendicular and parallel to walls show that any additional resistivity due to DW scattering is very small.

    Original languageEnglish (US)
    Pages (from-to)5243-5248
    Number of pages6
    JournalJournal of Applied Physics
    Volume85
    Issue number8 II A
    DOIs
    StatePublished - Apr 15 1999
    EventProceedings of the 43rd Annual Conference on Magnetism and Magnetic Materials - Miami, FL, United States
    Duration: Nov 9 1998Nov 12 1998

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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