The transport of perpendicular spins in a GaAs channel is investigated via a fully electrical method. A Tb20Fe62Co 18/Co40Fe40B20/MgO contact is used to inject perpendicular spin into the GaAs channel, where the Tb 20Fe62Co18 layer produces perpendicular magnetization and the Co40Fe40B20 layer enhances the spin polarization of the injection current. By measuring the three-terminal Hanle effect with an in-plane field, we obtained a spin signal of 0.65 Ω (0.04 Ω) and a spin lifetime of 0.30 ns (0.17 ns) at 1.8 K (300 K). The observed spin signal with a MgO barrier is more than double of that without a MgO barrier.
Bibliographical noteFunding Information:
This work was supported by the National Research Foundation of Korea (NRF) Grant funded by the Korea government (MEST) (No. 2012-0005631), the IT R&D program of MKE/KEIT (No. 10043398), and the KIST Institutional Program.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)