Current driven domain wall motions in rare earth transition metal alloys and it application toward tera bit information storage
| Project/Area Number |
22360122
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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 |
Electronic materials/Electric materials
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| Research Institution | Shinshu University |
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Principal Investigator |
LIU Xiaoxi 信州大学, 工学部, 准教授 (10372509)
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| Co-Investigator(Kenkyū-buntansha) |
MORISAKO Akimitsu 信州大学, 工学部, 教授 (20115380)
安川 雪子 信州大学, 工学部, 特任助教 (10458995)
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| Project Period (FY) |
2010 – 2012
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| Project Status |
Completed (Fiscal Year 2012)
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| Budget Amount *help |
¥19,110,000 (Direct Cost: ¥14,700,000、Indirect Cost: ¥4,410,000)
Fiscal Year 2012: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2011: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2010: ¥11,180,000 (Direct Cost: ¥8,600,000、Indirect Cost: ¥2,580,000)
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| Keywords | スピントロニクス / 情報記録 / 磁性細線 / 磁気メモリー / 磁壁 / スピントルク / 電子材料 / スピンデバイス |
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| Research Abstract |
One of the fundamentals in spintronics is that the magnetic domain walls can be driven by spin polarized current. Such phenomena indicate that the magnetic reversal can be achieved by current directly rather than by magnetic field. However, the critical current to drive the domain walls is as large as 1012A/m2in normal magnetic materials. In this research, we found the critical current density can be decrease to 1/100 by using rear earth transition alloys with perpendicular magn etic anisotropy. We have investigated the films composition, magnetic anisotropy, and its effect on critical current density. We have also developed a new process to measure spin polarization in the wires. Our results show that rear earth transition alloys with perpendicular magnetic anisotropy are prominent candidate for next generation information storage devices with extremely high density.
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Report
(4 results)
Research Products
(12 results)
