| Project/Area Number |
20360002
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Applied materials science/Crystal engineering
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| Research Institution | National Institute for Materials Science |
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Principal Investigator |
MITANI Seiji National Institute for Materials Science, 磁性材料センター, グループリーダー (20250813)
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| Co-Investigator(Kenkyū-buntansha) |
SAKURABA Yuya 東北大学, 金属材料研究所, 助教 (10451618)
MIZUGUCHI Masaki 東北大学, 金属材料研究所, 助教 (50397759)
|
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| Co-Investigator(Renkei-kenkyūsha) |
NIIZEKI Tomohiko 独立行政法人物質・材料研究機構, 磁性材料センター, NIMSポスドク研究員 (40567749)
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| Project Period (FY) |
2008 – 2010
|
| Project Status |
Completed (Fiscal Year 2010)
|
| Budget Amount *help |
¥18,460,000 (Direct Cost: ¥14,200,000、Indirect Cost: ¥4,260,000)
Fiscal Year 2010: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2009: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
Fiscal Year 2008: ¥8,060,000 (Direct Cost: ¥6,200,000、Indirect Cost: ¥1,860,000)
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| Keywords | 磁性 / スピントロニクス / ナノ構造 / ナノ粒子 / 低次元 / 超構造 / 2重接合 / 超薄膜 / ナノ材料 / スピン緩和 |
|---|
| Research Abstract |
The understanding of spin relaxation of conduction electrons is of particular interest for the development of spintronic devices. In this study, we investigated spin relaxation in low dimensional systems such as nanoparticles and ultrathin films by spin dependent transport measurements. While enhancement of spin relaxation time was observed in nanoparticles, such behavior was not obtained in ultrathin films. The difference possibly comes from the fact that electronic states in ultrathin films are not quantized in the in-plane directions. Simple model calculations were also performed for double-barrier magnetic tunnel junctions with enhanced spin relaxation time.
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