Electrical spin injection and accumulation in CoFe/MgO/Ge contacts at room temperature

Title
Electrical spin injection and accumulation in CoFe/MgO/Ge contacts at room temperature
Authors
전건록민병철조영훈이헌성신일재박창엽박승영신성철
Issue Date
2011-10
Publisher
Physical review B, Condensed matter and materials physics
Citation
VOL 84, NO 16, 165315-1-165315-10
Abstract
We report the all-electrical spin injection and detection in CoFe/MgO/moderately doped n-Ge contact at room temperature (RT), employing three-terminal Hanle measurements. A sizable spin signal of ~170 kΩ μ㎡ has been observed at RT, and the analysis using a single-step tunneling model gives a spin lifetime of ~120 ps and a spin diffusion length of ~683 nm in Ge. The observed spin signal shows asymmetric bias and temperature dependences which are strongly related to the asymmetry of the tunneling process.
URI
http://pubs.kist.re.kr/handle/201004/40522
ISSN
1098-0121
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KIST Publication > Article
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