Magnetic Relaxation of MgB<SUB>2</SUB>
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- Ikeda Hiroshi
- Institute of Materials Science, University of Tsukuba Cryogenics Center, University of Tsukuba
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- Koyano Tamotsu
- Institute of Materials Science, University of Tsukuba Cryogenics Center, University of Tsukuba
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- Arima Takashi
- Institute of Materials Science, University of Tsukuba
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- Yoshikawa Kouzo
- Takasago Research Center, Mitsubishi Heavy Industries, Ltd.
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- Yoshizaki Rozo
- Institute of Materials Science, University of Tsukuba Cryogenics Center, University of Tsukuba
Bibliographic Information
- Other Title
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- MgB<SUB>2</SUB>の磁化緩和
- MgB2の磁化緩和
- MgB2 ノ ジカ カンワ
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Abstract
We have investigated the transport and magnetic properties of the recently discovered superconducting MgB2. We obtained irreversibility temperature Tr(H) and irreversibility field Hr(T) from magnetic measurement and irreversibility field Bc2 from resistivity measurement. The irreversibility temperature Tr(H), was determined from the merging temperature of the magnetic moment observed in the zero field cooling (ZFC) process in to the one in field cooling (FC) process. We define the transport irreversibility line from the temperature at zero-resistivity in the presence of magnetic field. We also measured the magnetic relaxation of the remanent. The sample was cooled in zero field and the field above H*, where the flux front penetrated at the center of the sample. The time decay of the remanent moment was measured for about 105 s. The relaxation of the remanent moment showed the linear ln (t) dependence in the whole observed temperature range. Those results of the irreversibility lines are plotted in H-T plane. The magnetic irreversibility lines are consistent with each other, while the transport one locates at the higher temperature side.
Journal
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- Journal of the Japan Institute of Metals and Materials
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Journal of the Japan Institute of Metals and Materials 66 (4), 334-338, 2002
The Japan Institute of Metals and Materials
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Details 詳細情報について
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- CRID
- 1390282681468754688
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- NII Article ID
- 130007342476
- 10008832631
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- NII Book ID
- AN00187860
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- ISSN
- 18806880
- 24337501
- 00214876
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- NDL BIB ID
- 6151599
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed