Spin injection and detection up to room temperature in Heusler~alloy/$n$-GaAs spin valves

T. A. Peterson, S. J. Patel, C. C. Geppert +7

We have measured the spin injection efficiency and spin lifetime in Co${}_2$FeSi/$n$-GaAs lateral nonlocal spin valves from 20 to 300 K. We observe large ($\sim$40 $\mu$V) spin valve s…