2011 Fiscal Year Final Research Report
Direct observation of the dynamics of vortices in high temperature superconducting bulks and development of the strong bulk magnet
| Project/Area Number |
20560001
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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 |
Applied materials science/Crystal engineering
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| Research Institution | Iwate University |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
FUJISHIRO Hiroyuki 岩手大学, 工学部, 教授 (90199315)
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| Project Period (FY) |
2008 – 2011
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| Keywords | 超伝導バルク磁石 / パルス着磁 / 磁束ダイナミクス / 磁束ピン止め / 臨界電流密度 / 元素置換効果 |
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| Research Abstract |
To study the dynamics of vortices in high temperature superconducting bulks in the pulsed field, both local vortex densities and temperatures were measured. The vortices intruded into the bulk not only at the edges but also at the surfaces. The distribution of the local critical current density which was estimated from the magnetization loop using the small pieces cut from the bulk was consistent with the inhomogeneous trapped magnetic field profiles. The vortices were trapped at the weak /strong pinning region for the low/high applied magnetic field.
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