| Project/Area Number |
24656007
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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 |
Applied materials science/Crystal engineering
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| Research Institution | Saitama University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
HASEGAWA Shigehiko 大阪大学, 産業科学研究所, 准教授 (50189528)
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| Co-Investigator(Renkei-kenkyūsha) |
KITAJIMA Akira 大阪大学, 産業科学研究所, 特任助教 (50532248)
OSHIMA Akihiro 大阪大学, 産業科学研究所, 特任准教授 (80398924)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2013: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2012: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Keywords | スピン軌道相互作用 / スピン偏極 / 排他的論理和ゲート / スピン蓄積 / キャリヤスピン偏極度 / 電流スピン偏極度 / TbFeCo / Cu / YH2 / スピン偏極度 / 単極性伝導 / 両極性伝導 / スピントロニクス / スピン偏極電流 / 異常ホール効果 / キャリヤ移動度 / 論理演算ゲート / 排他的論理和 |
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| Outline of Final Research Achievements |
We have theoretically and experimentally designed the spin-polarization analyzer making use of the quasi-zero Hall coefficient (QZHC) characteristic in bipolar conductors such as dihydride phase of Y and Sc. We derived the closed formulae of Hall resistivity (HR) and transverse magnetoresisitivity (TMR) in the presence of spin splitting in electrochemical potential (ECP) caused by spin-polarized current injection from ferromagnetic electrodes. Our experiments used Co and/or TbFeCo as source and drain electrodes, from which the spin-polarized currents are injected into the bipolar conductor region. As predicted by our calculation, both HR and TMR are enhanced when these magnetic electrodes are used instead of nonmagnetic Au electrode. The enhancement is caused by the coupling mechanism between applied magnetostatic field and spin-orbit interaction through the spin splitting in the ECP. This feature as well as material choice can be applied to operation of exclusive OR gate.
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