2014 Fiscal Year Final Research Report
Spin-wave Devices for Collecting and Detecting Magnetic Nano-particles
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 |
Research Field |
Electron device/Electronic equipment
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Research Institution | Nagoya University |
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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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 |
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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Free Research Field |
ナノマグネティックス
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