Spin dependent mean-free path of low-energy electrons in ferromagnetic materials

Spin resolved attenuation measurements of electrons transmitted through overlayers of Fe and Co show that the electron inelastic mean free path (IMFP) in these materials is spin-dependent at low energies. The spin-up IMFP is larger than the spin-down IMFP. The values from different studies are in re...

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Bibliographic Details
Published in:Journal of electron spectroscopy and related phenomena 1999-01, Vol.98-99, p.17-23
Main Author: Hopster, H
Format: Article
Language:English
Subjects:
Attenuation length
Electron mean free path
Ferromagnets
Spin polarization
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Summary:Spin resolved attenuation measurements of electrons transmitted through overlayers of Fe and Co show that the electron inelastic mean free path (IMFP) in these materials is spin-dependent at low energies. The spin-up IMFP is larger than the spin-down IMFP. The values from different studies are in reasonable agreement. The data suggest that the origin of the spin dependence is mainly due to inelastic processes. Effects from spin dependent elastic scattering have not been identified directly in these experiments. The spin filter effect based on preferential attenuation of spin-down electrons can be used as a basis of spin polarization detectors.
ISSN:0368-2048
1873-2526
DOI:10.1016/S0368-2048(98)00272-2