| Project/Area Number |
06650353
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
Electronic materials/Electric materials
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| Research Institution | Utsunomiya University |
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Principal Investigator |
ISHII Kiyoshi Utsunomiya University, Faculty of Eangineering, Associate Professor, 工学部, 助教授 (30134258)
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| Co-Investigator(Kenkyū-buntansha) |
OHBA Takuya Teikyo University, School of Science and Engineering, Associated Professor, 理工学部, 助教授 (00211110)
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| Project Period (FY) |
1994 – 1995
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| Project Status |
Completed (Fiscal Year 1995)
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| Budget Amount *help |
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1995: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1994: ¥1,700,000 (Direct Cost: ¥1,700,000)
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| Keywords | giant magnetoresistance / magnetoresistance / granular magnetic material / fine particle / magnetic thin film / gas-flow-sputtering / 巨大磁気抵抗効果 / GMR / グラニュラ磁性体 / 磁性体超微粒子 |
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| Research Abstract |
Giant magnetoresistance (GMR) effects are observed for granular magnetic materials as well as for mutilayred films. Such granular materials are generally produced through thermal perticipation. So, granule size and concentration are hardly controlled independently. In this study, a new process was developed for producing granular materials with more controlled structures, and the magnetoresistance of specimens obtained by the process was examined. The results are summarized as follows.
1. A new process developed in this work allows in-situ growth of metal films with embedded Co or Ni-Fe fine particles.
2. Particle radius can be changed from about 4 nm to 10 nm.
3. Particle concentration in the matrix can be controlled.
4. Cu films with embedded 4-nm Co particles produced by the new process shows GMR effects.
These results suggest that the developed method has strong potentiality for producing magnetic granular films with controlled nano-structures which are very useful for the studies on GMR effects.
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