| Project/Area Number |
25630146
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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 |
Electron device/Electronic equipment
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| Research Institution | Nagoya University |
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Principal Investigator |
IWATA Satoshi 名古屋大学, エコトピア科学研究所, 教授 (60151742)
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| Co-Investigator(Kenkyū-buntansha) |
KATO Takeshi 名古屋大学, 工学研究科, 准教授 (50303665)
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| Project Period (FY) |
2013-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2013: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Keywords | スピン波 / 磁性微粒子 / バイオセンサ / 磁性多層膜 / スピンダイナミクス / ダンピング定数 / 磁性コロイド / 磁気センサ / 垂直磁化膜 / 迷路状磁区 / Co/Ni多層膜 |
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| Outline of Final Research Achievements |
In order to develop spin-wave devices for detection of biological molecules using magnetic nano-particles, perpendicular magnetized films have been prepared and their spin dynamics were measured. Perpendicular magnetized Co/Ni multilayers with period of 1 nm exhibit large perpendicular anisotropy, where the multilayers with Pt underlayer show larger anisotropy compared to the films with Ta underlayer. In spin dynamics observation using pump-prove method, precession of magnetization caused by a pump light sustained during over 300 ps. Damping parameter obtained fitting method of Co/Ni multilayers were approximately 0.020. This value is less than half value of 0.046 for GdFeCo amorphous films. These results implies that Co/Ni multilayers were appropriate material for spin-wave devices.
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