Thermal spin injection and accumulation in CoFe/MgO/n-type Ge contacts

Title
Thermal spin injection and accumulation in CoFe/MgO/n-type Ge contacts
Authors
전건록민병철박승영이경동송현석박윤호신성철
Issue Date
2012-12
Publisher
Scientific Reports
Citation
VOL 2, 962-1-962-7
Abstract
Understanding the interplay between spin and heat is a fundamental and intriguing subject. Here we report thermal spin injection and accumulation in CoFe/MgO/n-type Ge contacts with an asymmetry of tunnel spin polarization. Using local heating of electrodes by laser beam or electrical current, the thermally-induced spin accumulation is observed for both polarities of the temperature gradient across the tunnel contact. We observe that the magnitude of thermally injected spin signal scales linearly with the power of local heating of electrodes, and its sign is reversed as we invert the temperature gradient. A largeHanlemagnetothermopower (HMTP) of about 7.0% and the Seebeck spin tunneling coefficient of larger than 0.74 meV K21 are obtained at room temperature.
URI
http://pubs.kist.re.kr/handle/201004/44451
ISSN
20452322
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KIST Publication > Article
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