NDLI: Homogeneity of Superconducting Properties in Controlled Overpressure Processed Bi2223 Tapes

Content Provider	IEEE Xplore Digital Library
Author	Takahashi, K. Kitaguchi, H. Kumakura, H. Kobayashi, S. Kato, T. Sato, K.
Copyright Year	2002
Abstract	Recently, due to the controlled overpressure (CT-OP) sintering technique, performances such as critical current, n-value, unit-length and mechanical strength of Ag sheathed (Bi, Pb)₂Sr₂Ca₂Cu₃O_x (Bi2223) tapes were significantly enhanced. In order to investigate the origin of these improvements, we evaluated the distribution of the superconducting properties inside the tape along the width. We selected several kinds of CT-OP processed Bi2223 tapes and each tape was divided into three parts (one central part and two edge parts). We performed transport (critical current I_c) and magnetic (susceptibility) measurements. We found that a slight inhomogeneity in superconducting properties still remains even in the highest performance tape, whose I_c is about 200 A at 77 K. Critical current densities J_c are lower at the edge part than those of the central parts. These results indicate that we can expect and achieve further improvements of CT-OP processed Bi2223 tape by enhancing the performance of the edge parts of the tape.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	1167
Ending Page	1170
Page Count	4
File Size	160206
File Format	PDF
ISSN	10518223
Volume Number	18
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Superconducting films Process control Superconducting magnets Current measurement Magnetic field measurement Critical current Temperature Powders Multifilamentary superconductors Heat treatment superconducting tapes Bismuth compounds current density
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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Filament decoupling and magnetization loss of multifilamentary Bi2223 superconducting tapes

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Homogeneity of Superconducting Properties in Controlled Overpressure Processed Bi2223 Tapes

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