2011 Fiscal Year Final Research Report
Study on the self-organizing arrangements of nano-scale magnetic particles in Cu-base alloys and their mechanisms
| Project/Area Number |
21560683
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Physical properties of metals
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| Research Institution | Yokohama National University |
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Principal Investigator |
TAKEDA Mahoto 横浜国立大学, 工学研究院, 准教授 (30188198)
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| Co-Investigator(Renkei-kenkyūsha) |
HIROI Zenji 東京大学, 物性研究所, 教授 (30192719)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 銅合金 / ナノグラニュラー磁性体 / 透過電子顕微鏡 / 組成分析 / SQUID測定 |
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| Research Abstract |
Nano-granular ferromagnetic materials have heterogeneous microstructures comprising ferromagnetic fine particles and metallic or non-metallic bases. Accordingly, the microstructures are likely to give significant influences to their physical properties such as the giant magneto-resistance(GMR) effect. Despite the anticipation, the relationship between microstructure and magnetic properties has been investigated in few cases so far. The present study was aimed to make a close investigation to the relationship in Cu-Ni-Fe alloys, using transmission electron microscopy(TEM) and SQUID magnetic measurements. This investigation revealed that microstructure consisting of super-paramagnetic particles surpassed that containing fine ferromagnetic particles in the GMR effect.
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