Brillouin light scattering study of magnetic coupling in CoFe/Mn/CoFe

M. Chirita, G. Robins, Robert Stamps, R. Sooryakumar, M.E. Filipkowski, C.J. Gutierrez, G.A. Prinz

    Research output: Contribution to journalArticlepeer-review

    15 Citations (Scopus)


    Coupling mechanisms between Co0.75Fe0.25 films separated by Mn layers are investigated using Brillouin light scattering from thermal spin waves. Trilayers of CoFe/Mn/CoFe, grown by molecular-beam epitaxy, were studied with Mn thicknesses between 6 and 30 Angstrom. Spin-wave excitations corresponding to acoustic and optic modes in double layer magnetic structures were observed, and allowed a determination of a strong magnetic coupling between the CoFe films. Spin-wave frequencies were examined as functions of applied field, Mn film thickness, and temperature. A microscopic model is used to examine magnetic order in a ferromagnet/antiferromagnet/ferromagnet structure. Discrepancies between the data and predictions of the microscopic model provide evidence for a twist in the FeCo spins that extends into the ferromagnet layer. [S0163-1829(98)10117-0].
    Original languageEnglish
    Pages (from-to)869-876
    JournalPhysical Review B
    Issue number2
    Publication statusPublished - 1998


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