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

Title
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
전건록민병철신일재박창엽이헌성조영훈신성철
Issue Date
2012-02
Publisher
New journal of physics
Citation
VOL 14, NO 2, 023014-1-023014-13
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.
URI
http://pubs.kist.re.kr/handle/201004/42102
ISSN
13672630
Appears in Collections:
KIST Publication > Article
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