Opposite Spin Asymmetry of Elastic and Inelastic Scattering of Nonequilibrium Holes Injected into a Ferromagnet

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Park, B.G. and Banerjee, T. and Lodder, J.C. and Jansen, R. (2006) Opposite Spin Asymmetry of Elastic and Inelastic Scattering of Nonequilibrium Holes Injected into a Ferromagnet. Physical Review Letters, 97 (13). p. 137205. ISSN 0031-9007

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Abstract:The spin asymmetry of elastic and inelastic scattering of nonequilibrium holes injected into Co thin films is examined using a p-type magnetic tunnel transistor. Spin-dependent transmission yields a positive or negative magnetocurrent depending on Co thickness and hole energy. Up to a critical thickness of about 3 nm, (quasi)elastic scattering dominates with a short attenuation length (<1 nm) and preferential attenuation of holes in the majority spin bands, consistent with spin-wave emission. At a larger Co thickness, inelastic scattering dominates with a larger attenuation length (~4 nm) and opposite spin asymmetry.
Item Type:Article
Copyright:© 2006 American Physical Society
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Link to this item:http://purl.utwente.nl/publications/59074
Official URL:http://dx.doi.org/10.1103/PhysRevLett.97.137205
Publisher URL:http://link.aps.org/abstract/PRL/v97/e137205
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