日本応用磁気学会誌
Online ISSN : 1880-4004
Print ISSN : 0285-0192
ISSN-L : 0285-0192
論文
硬化物超伝導バルクマグネットの作製と特性
森田 充田中 将元橋本 操
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ジャーナル オープンアクセス

1995 年 19 巻 3 号 p. 744-747

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Oxide-superconductor bulk materials that can act as magnets after field cooling were made by a modified quench-and-melt-growth (QMG) process. To enlarge QMG crystals having a fine 211 phase in the matrix of a crystalline 123 phase, a modi tied QMG process was developed by adding a seeding technique and a Pt addition technique to the original QMG process. Enlarged QMG bulk superconductors were operated as high-field permanent magnets. A bulk magnet 70 mm in diameter and 35 mm in thickness had trapped maximum values of 4.5 T, 2.5 T, and 0.99 T at 40 K, 63 K, and 77 K, respectively. Thermornagnetomechanical instability leading to quenching phenomena was not observed above 40 K.

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© 1995 (社)日本応用磁気学会
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