TITLE

Magneto-optic effects in spin-injection devices

AUTHOR(S)
Ruggiero, S. T.; Williams, A.; Tanner, C. E.; Potashnik, S.; Moreland, J.; Rippard, W. H.
PUB. DATE
June 2003
SOURCE
Applied Physics Letters;6/23/2003, Vol. 82 Issue 25, p4599
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The magneto-optic properties of semi-transparent ferromagnetic films are presented in the context of ferromagnet/GaAs spin-injection devices. We have measured the polarization-dependent photoresponse and magneto-optic properties of Co/n-GaAs, Co/p-GaAs and NiFe/n-GaAs Schottky diodes and NiFe/SiO[SUB2] and Co/SiO[SUB2] structures as a function of ferromagnetic film thickness, ranging from 8 to 100 nm. Our results show that magneto-optic effects intrinsic to the ferromagnetic films (2%-3%) are sufficient to account for the majority of the polarization-dependent photoresponse of the ferromagnet/GaAs systems studied. These effects are well described by a simple thin-film transmission model, which gives an upper limit of 0.4% for spin-transmission effects.
ACCESSION #
10024394

 

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