| Project/Area Number |
14550648
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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 | MURORAN INSTITUTE OF TECHNOLOGY |
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Principal Investigator |
UEDA Yuji Muroran Institute of Technology, Department of Electrical and Electronic Engineering, Professor, 工学部, 教授 (70001279)
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| Co-Investigator(Kenkyū-buntansha) |
YAMADA Akihiro National College of Technology, Department of Electrical and Electronic Engineering, Research Associate, 助手 (40249719)
MATSUDA Mizushi Muroran Institute of Technology, Department of Electrical and Electronic Engineering, Associate Professor, 工学部, 助教授 (20261381)
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| Project Period (FY) |
2002 – 2003
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| Project Status |
Completed (Fiscal Year 2003)
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| Budget Amount *help |
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 2003: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2002: ¥1,400,000 (Direct Cost: ¥1,400,000)
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| Keywords | pulse electrodeposition method / ferromagnetic metal / non magnetic metal / multilayer films / alloy films / magnetism / computer control / electric resistance / パルス電析性 |
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| Research Abstract |
Pulse electrodeposition is a useful technique with which it is possible to achieve atomic-scale control of the layer composition, thickness of the multilayer and the gram size in ferromagnetic films by regulating the pulse amplitude and width. It is possible to produce ferromagnetic films with various magnetic properties from a single electrolytic solution containing more than two kinds of metallic ions, by changing the step pulse wave.
We attempted to fabricate ferromagnetic nano-structure multilayer films with the combination ferromagnetic Co layers, and non magnetic layer Au and Ag by computer controlled pulse electrodeposition method.
We have investigated the relationship between the magnetism and the magnetoresistance effect in the various multilayer films of the atomic level. The magnetoresistance effect is dependent on both the thickness of Co ferromagnetic layer and Ag,Au non-magnetic layers. The magnetization of these films shows the minimum value against the Ag and Au layer thickness. The Ag and Au layer thickness showing the maximum of MR ratio is not of necessary in agreement with the Ag and Au layer thickness showing the minimum of magnetization. Antiparallel alignment of magnetic spin is a necessary but not sufficient condition in order to generate the GMR of multilayer films. For the Co/Au multilayer films, the Au layer thickness showing the minimum of the magnetization shifts to higher side of the Au layer thickness.
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