2005 Fiscal Year Final Research Report Summary
Tracing of the time factor on strain and structural relaxation of terbium-iron amorphous alloys
| Project/Area Number |
15560579
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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 | Hakodate National College of Technology |
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Principal Investigator |
YAMADA Kazumasa Hakodate National College of Technology, Department of Electrical and Electronic Engineering, Associate Professor, 助教授 (40270178)
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| Project Period (FY) |
2003 – 2005
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| Keywords | Magneto-Optical recording disk / Terbium-iron alloy / Amorphous alloy / Strain / Structural relaxation / Invar / Thermal expansion property / Differential scanning caloriemetry |
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| Research Abstract |
Certainly metallic amorphous alloy is accompanied by structural relaxation phenomenon. Although the physical properties change of the relaxation by heat treatment is one of the fundamentals, the difficulty of the tracking measurement is missing the many important phenomena. Especially, Magneto-Optical Recording stability for Tb-Fe system amorphous alloy is closely related to the process, both sides of strain relaxation and structural relaxation in the long time is strongly necessity.
The following were examined : it puts the principal objective between strain and structural relaxation. In strain change process it comparatively shows the change in the short time with large volume of time factor. On the other hand, in structural relaxation which comparatively shows the change in long time with small volume of time factor.
For efficiency improvement of the tracing, physics experiment was made to fuse with computer experiment on this study. In the present work, by these methods, the aim of this article is to obtain of discussion for especially stability of physical and thermal atomic diffusion property.
It is obviously that the activation energy in structural relaxation process of strain is about two orders of magnitude smaller than that in conventional self-diffusion behavior. Furthermore, the same activation energy is almost one order of magnitude smaller than that in surface diffusion behavior. It is considered that the detailed examination of this part of the diffusivity should be further problem.
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