Current-induced spin injection from probe to ferromagnetic film

The distribution of the spin polarization of conduction electrons is calculated under the conditions for the spin injection from a probe to a ferromagnetic film in the presence of current. It is demonstrated that the main parameters that determine the deviation of the spin polarization from equilibr...

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Bibliographic Details
Published in:Journal of communications technology & electronics 2010-06, Vol.55 (6), p.668-672
Main Authors: Gulyaev, Yu. V., Zil’berman, P. E., Panas, A. I., Chigarev, S. G., Epshtein, E. M.
Format: Article
Language:English
Subjects:
Approximation
Communications Engineering
Communications systems
Conduction electrons
Deviation
Diffusion length
Electric fields
Electromagnetics
Electronics
Electrons
Engineering
Equilibrium
Ferromagnetic films
Ferromagnetism
Investigations
Mathematical analysis
Networks
Polarization
Population inversion
Radio Phenomena in Solids and Plasma
Studies
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Summary:The distribution of the spin polarization of conduction electrons is calculated under the conditions for the spin injection from a probe to a ferromagnetic film in the presence of current. It is demonstrated that the main parameters that determine the deviation of the spin polarization from equilibrium are the current density and spin polarization of the probe material, whereas the ratio of the probe diameter to the spin diffusion length weakly affects the result in certain ranges. The population inversion of the spin subbands can be reached at distances of about spin diffusion length from the probe-film interface.
ISSN:1064-2269
1555-6557
DOI:10.1134/S1064226910060082