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 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.
Jansen
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Information Storage Technology Group, MESA+ Research Institute, University of Twente, 7500 AE Enschede, The Netherlands.
Anil Kumar
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van't Erve
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Vlutters
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de Haan
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Lodder
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