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  • Title: Gilbert damping in single and multilayer ultrathin films: role of interfaces in nonlocal spin dynamics.
    Author: Urban R, Woltersdorf G, Heinrich B.
    Journal: Phys Rev Lett; 2001 Nov 19; 87(21):217204. PubMed ID: 11736376.
    Abstract:
    Unique features of the Gilbert damping in magnetic multilayers were investigated by ferromagnetic resonance (FMR) using magnetic single and double layer structures prepared by molecular beam epitaxy. The FMR linewidth for the Fe films in the double layer structures was larger than the FMR linewidth in the single Fe films having the same thickness. The additional FMR linewidth scaled inversely with the film thickness, and increased linearly with increasing microwave frequency. These results demonstrate that a transfer of electron angular momentum between the magnetic layers leads to additional relaxation torques.
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