Giant magnetoresistance in heterogeneous Cu-Co and Ag-Co alloy films (invited)

A. E. Berkowitz, J. R. Mitchell, M. J. Carey, A. P. Young, D. Rao, A. Starr, S. Zhang, F. E. Spada, F. T. Parker, A. Hutten, G. Thomas

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Abstract

Giant magnetoresistance in sputtered single films of Cu-Co and Ag-Co heterogeneous alloys is discussed. The films consist of Co-rich precipitates in a nonferromagnetic matrix. The Ag-Co films have higher Δρ/ρ and Δρ values than the Cu-Co films, possibly due to less Co dissolved in the Ag matrix. Δρ scales inversely with precipitate particle size, implying that Co-rich clusters ≤20 Å diameter may be most effective for spin dependent scattering. This trend of the data and a phenomenological model suggest that interfacial spin dependent scattering is significantly stronger than the scattering within the Co-rich particles.

Original languageEnglish (US)
Pages (from-to)5320-5325
Number of pages6
JournalJournal of Applied Physics
Volume73
Issue number10
DOIs
StatePublished - Dec 1 1993
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Berkowitz, A. E., Mitchell, J. R., Carey, M. J., Young, A. P., Rao, D., Starr, A., Zhang, S., Spada, F. E., Parker, F. T., Hutten, A., & Thomas, G. (1993). Giant magnetoresistance in heterogeneous Cu-Co and Ag-Co alloy films (invited). Journal of Applied Physics, 73(10), 5320-5325. https://doi.org/10.1063/1.353767