期刊
PHYSICAL REVIEW B
卷 88, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.88.014402
关键词
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资金
- CREST-JST
- STARC
- SCOPE-MIC
- TEPCO Memorial Foundation
- JSPS
- Nanotechnology Platform Program of MEXT, Japan
- Grants-in-Aid for Scientific Research [13J00339] Funding Source: KAKEN
Using low-temperature molecular beam epitaxy, we experimentally examine the substitutions of Fe atoms for Co ones in Co3-xFexSi (1.0 <= x <= 3.0) Heusler-compound films grown on Si and Ge. The Co-Fe atomic substitution at A and C sites can be confirmed by the conversion electron Mossbauer spectroscopy measurements. The magnetic moment and the magnitude of spin signals in nonlocal spin-valve measurements are systematically changed with increasing x in Co3-xFexSi. By assuming proper spin diffusion length for Co3-xFexSi on the basis of our previous work [Phys. Rev. B 85, 100404(R) (2012)], we experimentally verify that the Co-Fe substitution in Co3-xFexSi can directly affect the room-temperature spin polarization.
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