Flux pinning and critical currents in melt processed YBaCuO superconductors

M. Murakami; S. Gotoh; H. Fujimoto; K. Yamaguchi; N. Koshizuka; S. Tanaka

doi:10.1088/0953-2048/4/1S/005

Flux pinning and critical currents in melt processed YBaCuO superconductors

M. Murakami, S. Gotoh, H. Fujimoto, K. Yamaguchi, N. Koshizuka, S. Tanaka

Research output: Contribution to journal › Article › peer-review

220 Citations (Scopus)

Abstract

The authors report flux pinning behavior of melt processed YBaCuO containing Y₂BaCuO₅(211) inclusions. Although the size of the 211 inclusions is relatively large compared to the coherence length, they can work as pinning centers. The authors present the mechanism for pinning due to large normal precipitates. While large flux creep is observed in thin films exhibiting high J_c values, flux creep rate is very small in melt processed YBaCuO having a magnitude lower J_c values, which is understandable by considering that the pinning potential of large normal precipitates is much larger than that of small pinning centers and thereby the flux motion is less affected by thermal activation.

Original language	English
Article number	005
Pages (from-to)	S43-S50
Journal	Superconductor Science and Technology
Volume	4
Issue number	1 S
DOIs	https://doi.org/10.1088/0953-2048/4/1S/005
Publication status	Published - 1991 Dec 1
Externally published	Yes

ASJC Scopus subject areas

Ceramics and Composites
Condensed Matter Physics
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

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AU - Koshizuka, N.

AU - Tanaka, S.

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AB - The authors report flux pinning behavior of melt processed YBaCuO containing Y2BaCuO5(211) inclusions. Although the size of the 211 inclusions is relatively large compared to the coherence length, they can work as pinning centers. The authors present the mechanism for pinning due to large normal precipitates. While large flux creep is observed in thin films exhibiting high Jc values, flux creep rate is very small in melt processed YBaCuO having a magnitude lower Jc values, which is understandable by considering that the pinning potential of large normal precipitates is much larger than that of small pinning centers and thereby the flux motion is less affected by thermal activation.

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Flux pinning and critical currents in melt processed YBaCuO superconductors

Abstract

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