2012 Fiscal Year Final Research Report
Observation of accumulated spins through magneto-optical effect in reciprocal space
| Project/Area Number |
23654113
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Condensed matter physics II
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| Research Institution | University of Tsukuba |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
NAGAHAMA Taro 北海道大学, 工学研究院, 准教授 (20357651)
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| Project Period (FY) |
2011 – 2012
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| Keywords | スピンホール効果 / 磁気光学効果 / スピン蓄積 |
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| Research Abstract |
In this study, we attempted to detect spin accumulation signal at the edges of platinum gratings with electric current through magneto-optical effect(MOKE) .An optical diffractometer equipped with a MOKE detector based upon a polarization modulation technique was built. A blue laser diode is chosen as a light source and the gratings were designed by taking account of the wavelength.A double modulation technique of the ac current and polarization modulation was adopted. The distinct of spin accumulation signal has not been observed yet, suggesting that other improvements are needed to reduce the background noise and to enhance the spin accumulation signal.
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