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The ferromagnetic spin filter

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4 Author(s)
Weber, W. ; Lab. fur Festkorperphys., Eidgenossische Tech. Hochschule, Zurich, Switzerland ; Oberli, D. ; Riesen, S. ; Siegmann, H.C.

The transmission of spin-polarized electrons across free standing Au/Co/Au foils has been investigated. A larger transmission probability for electrons with their spin polarization P&oarr;0 parallel to the sample magnetization M&oarr; than for electrons with P&oarr;0 antiparallel to M&oarr; is found. By choosing P&oarr;0 perpendicular to M&oarr; the spin polarization rotates into the direction of M&oarr; and simultaneously also precesses around it. The precession around M&oarr; is the electron analogue to the Faraday rotation observed with polarized light. It is caused by the spin dependence of the inner potential of the ferromagnetic Co film

Published in:

Magnetics, IEEE Transactions on  (Volume:35 ,  Issue: 5 )