期刊
PHYSICAL REVIEW B
卷 85, 期 10, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.85.100404
关键词
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资金
- CREST-JST
- TEPCO Memorial Foundation
- JSPS
- Grants-in-Aid for Scientific Research [23656223] Funding Source: KAKEN
We study room-temperature generation and detection of pure spin currents using lateral spin-valve devices with electrodes formed from the Heusler compounds Co2FeSi (CFS) or Fe3Si (FS). The magnitude of the nonlocal spin-valve signals is strongly affected by resistivity variations observed particularly in low-temperature-grown Heusler compounds containing ordered structures. From an analysis based on a one-dimensional spin diffusion model, we find that the spin polarization monotonically increases with decreasing resistivity, which depends on the structural ordering, for both the CFS and FS electrodes, and show that CFS has a larger spin polarization than FS.
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