| Project/Area Number |
15K04648
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Applied materials
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| Research Institution | Saitama University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
長谷川 繁彦 大阪大学, 産業科学研究所, 准教授 (50189528)
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| Co-Investigator(Renkei-kenkyūsha) |
AWANO Hiroyuki 豊田工業大学, 工学(系)研究科(研究院), 教授 (40571675)
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| Research Collaborator |
KUROKAWA Yuichiro
KITAJIMA Akira
HIGUCHI Koji
NAKAMURA Osamu
HANAJIRI Tatsuro
NAKAJIMA Yoshikata
TOKUDA Masahide
FUJII Yasuhiko
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2015: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Keywords | スピントロニクス / スピン軌道相互作用 / 両極性伝導 / 水素吸蔵体YH2 / スピン流の自律モード / スピン蓄積 / 電荷蓄積 / 共鳴ホール効果 / バイポーラ伝導 / 電流スピン偏極 / 異常ホール効果 |
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| Outline of Final Research Achievements |
We have proposed a new type of the Hall effect, the signal of which is amplified due to the generation of a sustaining mode of spin current. The conditions indispensable for the observation of the effect are (i) the presence of the transverse component of an effective electric field due to spin splitting in chemical potential in addition to the longitudinal component; (ii) the simultaneous presence of holes and electrons each having approximately the same characteristics; (iii) spin-polarized current injection from magnetized electrodes; (iv) the zero transverse current. The present model was experimentally verified by using van der Pauw-type Hall devices consisting of the nonmagnetic bipolar conductor YH2 and TbFeCo electrodes. Replacing Au electrodes with TbFeCo electrodes alters the Hall resistivity from the ordinary Hall effect to the anomalous Hall-like effect with an enhancement factor of approximately 50 at 4T, cosistent with the present model.
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