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Thermal spin injection and accumulation in n-type Si with CoFe/MgO tunnel contacts through Seebeck spin tunneling | Kun-Rok Jeon
; Byoung-Chul Min
; Seung-Young Park
; Kyeong-Dong Lee
; Hyon-Seok Song
; Youn-Ho Park
; Sung-Chul Shin
; | Date: |
15 Jul 2013 | Abstract: | We report the thermal spin injection and accumulation in n-type Si with
crystalline CoFe/MgO tunnel contacts through Seebeck spin tunneling (SST) at
room temperature (RT). With the Joule heating (laser heating) of Si (CoFe), the
thermally induced spin accumulation is detected by means of the Hanle effect
for both polarities of the temperature gradient across the tunnel contact. The
magnitude of the thermal spin signal scales linearly with the heating power and
its sign is reversed as we invert the temperature gradient, demonstrating the
major features of SST and thermal spin accumulation. We observe that, for the
Si (CoFe) heating, the thermal spin signal induced by SST corresponds to the
majority (minority) spin accumulation in the Si. Based on a quantitative
comparison of thermal and electrical spin signals, it is noted that the thermal
spin injection through SST can be a viable approach for the efficient injection
of spin accumulation | Source: | arXiv, 1307.3828 | Services: | Forum | Review | PDF | Favorites |
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