Microstructures and critical currents in melt-processed YBCO

H. Fujimoto; T. Taguchi; M. Murakami; N. Nakamura; N. Koshizuka

doi:10.1016/0011-2275(92)90006-V

Microstructures and critical currents in melt-processed YBCO

H. Fujimoto, T. Taguchi, M. Murakami, N. Nakamura, N. Koshizuka

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

17 Citations (Scopus)

Abstract

YBaCuO bulk superconductors prepared by the melt-powder-melt-growth process (MPMG) have a high critical current density. It has been found that non-superconducting Y₂BaCuO₅ (211) particles dispersed in the 123 superconducting phase can work as strong pinning centres, resulting in higher J_c values. Though 211 particles are considered to be the main pinning centres, defects such as twins and stacking faults are observed in melt-processed YBCO. In this study the effect of twin boundaries on the flux pinning was measured magnetically. The results indicate that twin planes contribute to flux pinning, but that their effect is not large in MPMG samples.

Original language	English
Pages (from-to)	954-958
Number of pages	5
Journal	Cryogenics
Volume	32
Issue number	11
DOIs	https://doi.org/10.1016/0011-2275(92)90006-V
Publication status	Published - 1992
Externally published	Yes

Keywords

YBCO
critical current density
flux pinning

ASJC Scopus subject areas

Materials Science(all)
Physics and Astronomy(all)

Access to Document

10.1016/0011-2275(92)90006-V

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Cite this

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title = "Microstructures and critical currents in melt-processed YBCO",

abstract = "YBaCuO bulk superconductors prepared by the melt-powder-melt-growth process (MPMG) have a high critical current density. It has been found that non-superconducting Y2BaCuO5 (211) particles dispersed in the 123 superconducting phase can work as strong pinning centres, resulting in higher Jc values. Though 211 particles are considered to be the main pinning centres, defects such as twins and stacking faults are observed in melt-processed YBCO. In this study the effect of twin boundaries on the flux pinning was measured magnetically. The results indicate that twin planes contribute to flux pinning, but that their effect is not large in MPMG samples.",

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T1 - Microstructures and critical currents in melt-processed YBCO

AU - Fujimoto, H.

AU - Taguchi, T.

AU - Murakami, M.

AU - Nakamura, N.

AU - Koshizuka, N.

PY - 1992

Y1 - 1992

N2 - YBaCuO bulk superconductors prepared by the melt-powder-melt-growth process (MPMG) have a high critical current density. It has been found that non-superconducting Y2BaCuO5 (211) particles dispersed in the 123 superconducting phase can work as strong pinning centres, resulting in higher Jc values. Though 211 particles are considered to be the main pinning centres, defects such as twins and stacking faults are observed in melt-processed YBCO. In this study the effect of twin boundaries on the flux pinning was measured magnetically. The results indicate that twin planes contribute to flux pinning, but that their effect is not large in MPMG samples.

AB - YBaCuO bulk superconductors prepared by the melt-powder-melt-growth process (MPMG) have a high critical current density. It has been found that non-superconducting Y2BaCuO5 (211) particles dispersed in the 123 superconducting phase can work as strong pinning centres, resulting in higher Jc values. Though 211 particles are considered to be the main pinning centres, defects such as twins and stacking faults are observed in melt-processed YBCO. In this study the effect of twin boundaries on the flux pinning was measured magnetically. The results indicate that twin planes contribute to flux pinning, but that their effect is not large in MPMG samples.

KW - YBCO

KW - critical current density

KW - flux pinning

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