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A Proposal of New Fabricating Technique of Large MgB _{2} Bulk by a Capsule Method

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3 Author(s)
Tomoyuki Naito ; Faculty of Engineering, Iwate University, Morioka 020-8551, Japan, and Soft-Path Engineering Research Center (SPERC), Faculty of Engineering, Iwate University, Morioka, Japan ; Tomohisa Sasaki ; Hiroyuki Fujishiro

We proposed a new fabricating technique of a large superconducting bulk (20-30 mm in diameter) by a capsule method and measured the trapped field distribution for the bulks. The capsule consists of a couple of commercial stainless steel flanges, a stainless steel plate and a copper gasket. The bulks showed a superconducting transition at 38.3-38.6 K with a transition width of 0.6-1.1 K. The trapped magnetic field of the center of the bulk surface reached 1.65 T at 14 K for the bulk 30 mm in diameter. These results indicate that the capsule method is useful to produce the tesla-order large bulk magnet.

Published in:

IEEE Transactions on Applied Superconductivity  (Volume:22 ,  Issue: 3 )