Thermal spin-wave scattering in hot-electron magnetotransport across a spin valve

The role of thermal scattering in spin-dependent transport of hot electrons at 0.9 eV is studied using a spin-valve transistor with a soft Ni(80)Fe(20)/Au/Co base. Spin-dependent scattering makes the collected electron current depend sensitively on the magnetic state of the base. The magnetocurrent...

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Bibliographic Details
Published in:Physical review letters 2000-10, Vol.85 (15), p.3277-3280
Main Authors: Jansen, R, Anil Kumar, P S, van't Erve, O M, Vlutters, R, de Haan, P, Lodder, J C
Format: Article
Language:English
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Summary:The role of thermal scattering in spin-dependent transport of hot electrons at 0.9 eV is studied using a spin-valve transistor with a soft Ni(80)Fe(20)/Au/Co base. Spin-dependent scattering makes the collected electron current depend sensitively on the magnetic state of the base. The magnetocurrent reaches 560% at 100 K, decays with increasing temperature, and a huge effect of 350% still remains at room temperature. The results demonstrate that thermal spin waves produce quasielastic spin-flip scattering of hot electrons, resulting in mixing of the two spin channels.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.85.3277