First-principles study of magnetization relaxation enhancement and spin transfer in thin magnetic films

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Zwierzycki, Maciej and Tserkovnyak, Yaroslav and Kelly, Paul J. and Brataas, Arne and Bauer, Gerrit E.W. (2005) First-principles study of magnetization relaxation enhancement and spin transfer in thin magnetic films. Physical Review B: Condensed matter and materials physics, 71 (6). 064420. ISSN 1098-0121

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Abstract:The interface-induced magnetization damping of thin ferromagnetic films in contact with normal-metal layers is calculated from first principles for clean and disordered Fe/Au and Co/Cu interfaces. Interference effects arising from coherent scattering turn out to be very small, consistent with a very small magnetic coherence length. Because the mixing conductances which govern the spin transfer are to a good approximation real-valued, the spin pumping can be described by an increased Gilbert damping factor but an unmodified gyromagnetic ratio. The results also confirm that the spin-current-induced magnetization torque is an interface effect.
Item Type:Article
Copyright:© 2005 The American Physical Society
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Science and Technology (TNW)
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Link to this item:http://purl.utwente.nl/publications/50267
Official URL:http://dx.doi.org/10.1103/PhysRevB.71.064420
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Metis ID: 223664