Title :
The ferromagnetic spin filter
Author :
Weber, W. ; Oberli, D. ; Riesen, S. ; Siegmann, H.C.
Author_Institution :
Lab. fur Festkorperphys., Eidgenossische Tech. Hochschule, Zurich, Switzerland
fDate :
9/1/1999 12:00:00 AM
Abstract :
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
Keywords :
cobalt; electron spectroscopy; electron spin polarisation; ferromagnetic materials; filters; gold; magnetic multilayers; magnetic thin films; magnetisation; Au-Co-Au; Faraday rotation; electron analogue; ferromagnetic Co film; ferromagnetic spin filter; free standing Au/Co/Au foils; inner potential; sample magnetization; spin dependence; transmission of spin-polarized electrons; transmission probability; Electron beams; Gold; Information filtering; Information filters; Laboratories; Light scattering; Magnetic materials; Magnetization; Optical polarization; Pollution measurement;
Journal_Title :
Magnetics, IEEE Transactions on
