Jeon, Kun-Rok Min, Byoung-Chul Park, Seung-Young Lee, Kyeong-Dong Song, Hyon-Seok Park, Youn-Ho Jo, Young-Hun Shin, Sung-Chul 2024-01-20T13:32:04Z 2024-01-20T13:32:04Z 2021-09-04 2012-12 2045-2322 https://pubs.kist.re.kr/handle/201004/128620 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 large Hanle magnetothermopower (HMTP) of about 7.0% and the Seebeck spin tunneling coefficient of larger than 0.74 meV K-1 are obtained at room temperature. English NATURE PUBLISHING GROUP Thermal spin injection and accumulation in CoFe/MgO/n-type Ge contacts Article 10.1038/srep00962 1 SCIENTIFIC REPORTS, v.2 SCIENTIFIC REPORTS 2 scie scopus 000312331200001 2-s2.0-84871800922 Multidisciplinary Sciences Science & Technology - Other Topics Article ROOM-TEMPERATURE FERROMAGNET SILICON MAGNETORESISTANCE POLARIZATION TRANSPORT