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Title: Electrical spin injection in a ferromagnetic metal/insulator/semiconductor tunnel heterostructure
Authors: Motsnyi, VF
Safarov, VI
Van Dorpe, Pol
Das, J
Van Roy, Willem
Goovaerts, E
Borghs, Gustaaf
De Boeck, J #
Issue Date: Aug-2003
Publisher: Kluwer academic/plenum publ
Series Title: Journal of superconductivity vol:16 issue:4 pages:671-678
Abstract: We demonstrate experimentally the electrical spin injection from a ferromagnetic metal/tunnel barrier contact into a semiconductor III-V heterostructure. The injected electrons have an in-plane spin orientation. We show that by applying an oblique external magnetic field this spin orientation can be manipulated within the semiconductor, and a nonzero perpendicular spin component arises. This perpendicular component can be easily monitored by optical means (circular polarization of the emitted light). In a CoFe/AlOx/(Al,Ga)As/GaAs heterostructure we observe injected spin polarization in access of 9% at 80 K and optimized structures have recently shown spin injection up to room temperature.
ISSN: 0896-1107
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Physics and Astronomy - miscellaneous
Associated Section of ESAT - INSYS, Integrated Systems
# (joint) last author

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