Unconventional Hanle effect in a highly ordered CoFe/MgO/n-Si contact: non-monotonic bias and temperature dependence and sign inversion of the spin signal
- Authors
- Jeon, Kun-Rok; Min, Byoung-Chul; Shin, Il-Jae; Park, Chang-Yup; Lee, Hun-Sung; Jo, Young-Hun; Shin, Sung-Chul
- Issue Date
- 2012-02
- Publisher
- IOP PUBLISHING LTD
- Citation
- NEW JOURNAL OF PHYSICS, v.14
- Abstract
- We report in this paper the unconventional bias and temperature dependence of the Hanle effect in a highly ordered CoFe/MgO/n-Si contact investigated by means of a three-terminal Hanle method. The spin signal and the effective spin lifetime obtained in this system show non-monotonic behavior with bias and temperature variations. Interestingly, the sign of the spin signal changes significantly with the bias voltage at a low temperature. The sign inversion is presumably ascribed to the contribution of interfacial resonant states formed at the CoFe/MgO interface or bound states in the Si surface during the spin extraction process.
- Keywords
- INJECTION; SILICON; POLARIZATION; SPINTRONICS; TRANSPORT
- ISSN
- 1367-2630
- URI
- https://pubs.kist.re.kr/handle/201004/129608
- DOI
- 10.1088/1367-2630/14/2/023014
- Appears in Collections:
- KIST Article > 2012
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