Improvement of Trapped Magnetic Field of a REBCO Bulk Magnet Activated by Pulsed Field Magnetization in a High-Cooling Power Two-Stage GM-Type Refrigerator

Kazuya Yokoyama, Tetsuo Oka

研究成果: Article

抄録

We developed a high-cooling power bulk magnet system using a 12 K two-stage Gifford-McMahon (GM)-type refrigerator with a cooling ability of 12 W at 20 K in our previous study. When a single pulsed field was applied using a GdBCO bulk, the maximum trapped field of 3.59 T at the center of sample surface and the total magnetic flux of 2.89 mWb were achieved. In this paper, we aim to improve the trapped magnetic field by increasing the size of soft-iron yoke. When the same experiment was carried out using the same bulk, the trapped field was increased to 3.85 T. Moreover, the total magnetic flux reached a value of 3.97 mWb by a multipulsed field magnetization.

元の言語English
記事番号8633979
ジャーナルIEEE Transactions on Applied Superconductivity
29
発行部数5
DOI
出版物ステータスPublished - 2019 8 1

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trapped magnetic fields
Refrigerators
refrigerators
Magnetic flux
Magnets
magnetic flux
Magnetization
magnets
Magnetic fields
Cooling
cooling
magnetization
Iron
iron
Experiments

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

これを引用

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abstract = "We developed a high-cooling power bulk magnet system using a 12 K two-stage Gifford-McMahon (GM)-type refrigerator with a cooling ability of 12 W at 20 K in our previous study. When a single pulsed field was applied using a GdBCO bulk, the maximum trapped field of 3.59 T at the center of sample surface and the total magnetic flux of 2.89 mWb were achieved. In this paper, we aim to improve the trapped magnetic field by increasing the size of soft-iron yoke. When the same experiment was carried out using the same bulk, the trapped field was increased to 3.85 T. Moreover, the total magnetic flux reached a value of 3.97 mWb by a multipulsed field magnetization.",
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T1 - Improvement of Trapped Magnetic Field of a REBCO Bulk Magnet Activated by Pulsed Field Magnetization in a High-Cooling Power Two-Stage GM-Type Refrigerator

AU - Yokoyama, Kazuya

AU - Oka, Tetsuo

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KW - pulsed field magnetization

KW - REBCO bulk superconductor

KW - soft-iron yoke

KW - total magnetic flux

KW - two-stage Gifford-McMahon (GM)-type refrigerator

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