Self-field ac losses in biaxially aligned Y{endash}Ba{endash}Cu{endash}O tape conductors

Journal Article · Sat Nov 01 04:00:00 EST 1997 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.120180· OSTI ID:544765

Iijima, Y; Hosaka, M; Sadakata, N; Saitoh, T; Kohno, O ^[1]; Takeda, K ^[2]

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1. Materials Research Laboratory, Fujikura Ltd., 1-5-1, Kiba, Koto-ku, Tokyo 135 (Japan)
2. Super-GM, 5-14-10, Nishitenma, Osaka 530 (Japan)

Self-field ac losses were measured by the conventional ac four-probe method in biaxially aligned Y{endash}Ba{endash}Cu{endash}O tapes using polycrystalline Hastelloy tapes with textured yttria-stabilized-zirconia buffer layers. The ac losses increased in proportion to the fourth power of transport current in the high J{sub c} sample, and agreed well with Norris{close_quote} equation for thin strip conductors. However, the low J{sub c} sample had rather higher losses than Norris{close_quote} prediction, suggesting excessive magnetic flux penetration caused by percolated current paths. The results confirmed Norris{close_quote} prediction of the low ac losses for thin strip conductors, and indicated the importance of removing percolated structures of current paths to avoid higher ac losses than the theoretical predictions based on uniform conductors. {copyright} {ital 1997 American Institute of Physics.}

• OSTI ID: 544765
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 18 Vol. 71; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AC LOSSES
BARIUM COMPOUNDS
BARIUM OXIDES
COPPER OXIDES
HIGH-TC SUPERCONDUCTORS
PENETRATION DEPTH
SUPERCONDUCTING WIRES
TEXTURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES