TITLE

Nuclear magnetic resonance in a ferromagnet–semiconductor heterostructure

AUTHOR(S)
Strand, J.; Isakovic, A. F.; Lou, X.; Crowell, P. A.; Schultz, B. D.; Palmstrøm, C. J.
PUB. DATE
October 2003
SOURCE
Applied Physics Letters;10/20/2003, Vol. 83 Issue 16, p3335
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We report the observation of nuclear magnetic resonance in a ferromagnet–semiconductor heterostructure in the presence of a spin-polarized current. Spin-polarized electrons injected from a metallic ferromagnet dynamically polarize a large nuclear spin population in a GaAs quantum well. The characteristic time for the polarization process is approximately 20 s, and the nuclear polarization can persist for several minutes after the current is turned off. Resonant depolarization is observed in the presence of an ac magnetic field or when the injection current is modulated at the nuclear magnetic resonance frequency. © 2003 American Institute of Physics.
ACCESSION #
11097788

 

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