Lateral spin valves with two-different Heusler-alloy electrodes on the same platform

Abstract

Using room-temperature molecular beam epitaxy on Si(111), we demonstrate Heusler-alloy bilayers consisting of L21-Co2FeSi (CFS) and D03-Fe3Si (FS). By fabricating lateral spin valves with L21-CFS and D03-FS electrodes, we can see ideal spin signals even though we use one L21-CFS as a spin injector and another D03-FS as a spin detector. The difference in the spin absorption between L21-CFS and D03-FS can also be examined, and we find that the spin resistance of D03-FS is larger than that of L21-CFS. This work will be useful for understanding spin transport in lateral spin-valve devices with different Heusler-alloy electrodes.