The ferromagnetic spin filter

Author

Weber, W. ; Oberli, D. ; Riesen, S. ; Siegmann, H.C.

Author_Institution

Lab. fur Festkorperphys., Eidgenossische Tech. Hochschule, Zurich, Switzerland

Volume

35

Issue

5

fYear

1999

fDate

9/1/1999 12:00:00 AM

Firstpage

2907

Lastpage

2909

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;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.801021

Filename

801021