| Project/Area Number |
08555074
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
Electronic materials/Electric materials
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| Research Institution | NAGOYA UNIVERSITY |
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Principal Investigator |
TSUNASHIMA Shigeru NAGOYA UNIVERSITY,DEPT.ELECTRONICS,PROFESSOR, 工学研究科, 教授 (80023323)
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| Co-Investigator(Kenkyū-buntansha) |
KATO Takeshi NAGOYA UNIVERSITY,DEPT.ELECTRONICS,RESEARCH ASSOCIATE, 工学研究科, 助手 (50303665)
IWATA Satoshi NAGOYA UNIVERSITY,DEPT.ELECTRONICS,ASSOCIATE PROFESSOR, 工学研究科, 助教授 (60151742)
兪 祥游 名古屋大学, 工学研究科, 助手 (40262860)
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| Project Period (FY) |
1996 – 1998
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| Project Status |
Completed (Fiscal Year 1998)
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| Budget Amount *help |
¥13,600,000 (Direct Cost: ¥13,600,000)
Fiscal Year 1998: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1997: ¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1996: ¥10,700,000 (Direct Cost: ¥10,700,000)
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| Keywords | MAGETO-OPTICAL RECORDING / MAGNETO-OPTICAL EFFECT / OPTICAL WAVE GUIDE / OPTICAL HEAD / NEAR FIELD / KERR ROTATION |
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| Research Abstract |
Thermomagnetic recording process has been simulated for transition metal (TM) -rich and rare earth (RE) -rich TbFeCo films assuming beam spot size of 1 and 0.1 micron, where very simple temperature dependence is assumed for the wall energy. For the TM-rich Tbl8 (Fe78Co22) 82 film, domains smaller than 0.1 micron can be written owing to the large stray field. On the other hand, for the RE-rich Tb25.6 (Fe78Co22) 74.4 film, small domains cannot be written due to the large effective field which, originating from the wall energy and its spatial gradient, forces to shrink the domain.
Local structural anisotropy was estimated using extended X-ray absorption fine structure (EXAFS) spectroscopy for Dy/Fe multilayers prepared by sputtering and vacuum deposition methods.Fourier transformed Fe-EXAFS indicated a difference in the atomic coordination between in-plane and out-of-plane. Both the structural anisotropy and the perpendicular magnetic anisotropy change depending on the bilayer period and the preparation methods. The variation of the structural anisotropy was found corresponds closely to that of the perpendicular magnetic anisotropy
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