R. Wang, X. Jiang, et al.
Applied Physics Letters
The spin polarization of current injected into GaAs from a CoFe/MgO(100) tunnel injector is inferred from the electroluminescence polarization from GaAs/AlGaAs quantum well detectors. The polarization reaches 57% at 100 K and 47% at 290 K in a 5 T perpendicular magnetic field. Taking into account the field dependence of the luminescence polarization, the spin injection efficiency is at least 52% at 100 K, and 32% at 290 K. We find a nonmonotonic temperature dependence of the polarization which can be attributed to spin relaxation in the quantum well detectors. © 2005 The American Physical Society.
R. Wang, X. Jiang, et al.
Applied Physics Letters
M.-P. Bernal, H. Coufal, et al.
Applied Optics
H. Gunther, R.M. Shelby, et al.
CLEO 1997
R.M. MacFarlane, C.S. Yannoni, et al.
Optics Communications