doi:10.1109/TASC.2010.2091241

Evaluation of Self-Field Distributions for Bi2223 Tapes With Oxide Barriers Carrying DC Transport Current 利用統計を見る

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アイテムタイプ	学術雑誌論文 / Journal Article
言語	英語
キーワード	Bi2223 tapes, oxide barriers, transport current, self-field, Hall-probe
著者	牧原知秀稲田亮史 ( 研究者リゾルバーID: 1000030345954 , 科研費研究者番号: 30345954 ) 太田昭男 ( 研究者リゾルバーID: 1000010124728 , 科研費研究者番号: 10124728 ) 坂元周作李成山張平祥
著者別名	Makihara Tomohide Inada Ryoji Oota Akio Sakamoto Shusaku Li Chengshan Zhang Pingxiang
抄録	For AC loss reduction in Bi2223 tapes subjected to an AC external magnetic field, twisting the superconducting filaments and/or introducing oxide layers as highly resistive barriers around each filament are required. However, the structure of barrier tape becomes very complex and longitudinal uniformity of both transport property and tape structure could be easily deteriorated. To improve the current transport capability and its longitudinal uniformity for barrier tape for AC use, simple and non-destructive techniques to characterize them should be indispensable. In this paper, we examined the self-field distributions for Bi2223 tapes with oxide barriers carrying DC transport current by a scanning Hall-probe microscopy (SHM). Non-twisted and twisted 19-filamentary tapes with SrZrO3 + Bi2212 barriers were prepared by powder-in-tube process. The distributions of self-field in perpendicular to the broader face of a tape carrying DC current below critical current Ic was measured at 77 K by SHM with an active area of 50 μm × 50 μm, at 0.5 mm away from the tape surface. Based on the measured self-field distributions, longitudinal non-uniformity of transport properties and the presence of local defects to obstruct the current transport in barrier tapes were investigated.
雑誌名	IEEE Transactions on Applied Superconductivity
巻	21
号	3
ページ	2820 - 2823
発行年	2011-06
出版者	IEEE
ISSN	1051-8223
DOI	10.1109/TASC.2010.2091241
権利	This is the author's version of the work. Copyright (C) 2011 IEEE. IEEE Transactions on on Applied Superconductivity, vol.21, no.3, Pages 2820-2823. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
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Evaluation of Self-Field Distributions for Bi2223 Tapes With Oxide Barriers Carrying DC Transport Current 利用統計を見る

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