Details

Autor(en) / Beteiligte

• Fuhrer, A.
• Alvarado, S. F.
• Salis, G.
• Allenspach, R.

Titel

Fast electrical switching of spin injection in nonlocal spin transport devices

Ist Teil von

• Applied physics letters, 2011-05, Vol.98 (20), p.202104-202104-3

Ort / Verlag

American Institute of Physics

Erscheinungsjahr

2011

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We present spin-injection experiments in a nonlocal spin transport device where spin is injected from a ferromagnetic FeCo electrode into a GaAs epilayer. The magnetization of the injection contact is switched by Oersted fields generated by alternating current pulses. This enables fast and offset-free measurements of nonlocal spin signals. Due to a negligible time-averaged electron spin polarization, dynamic nuclear polarization effects are small and Hanle curves measured down to T = 3   K can be fit very accurately by drift-diffusion theory if a small constant Overhauser field B N = 0.4   mT is accounted for.