Microstructure and superconducting properties of meltprocessed RE-Ba-Cu-O with dispersed barium cerate particles

S. Nariki; N. Sakai; M. Murakami; I. Hirabayashi

doi:10.1088/1742-6596/43/1/093

Microstructure and superconducting properties of meltprocessed RE-Ba-Cu-O with dispersed barium cerate particles

S. Nariki, N. Sakai, M. Murakami, I. Hirabayashi

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

Abstract

We studied microstructure and superconducting properties of melt-processed RE123 (REY and Dy) bulk superconductors with a large amount of BaCeO₃ addition. The melttextured bulk samples with compositions of Y123 + xBaCeO ₃ (x0.05-0.4) and 0.5 wt% of Pt were fabricated in air. The BaCeO₃ particles with the diameter of 1-2 νm were trapped in the melt-textured samples. The critical current density (J_c) in a low field region increased with the amount of BaCeO₃ inclusions. This suggests the BaCeO₃ particles act as effective flux pinning centers, as well as Y211 particles in conventional melt-textured Y-Ba-Cu-O bulk materials. We found that the size of BaCeO₃ particles could be reduced by substituting Zr on Ce site. The Y123 bulk sample with 30 mol% of Ba(Ce_0.75Zr_0.25)O₃ and 0.5 wt% Pt showed a high J_c value of 110 kA/cm² at 77 K. The Dy123 bulk samples dispersed BaCeO₃ and Ba(Ce_0.75Zr_0.25)O ₃ particles also exhibited excellent J_c-B properties.

Original language	English
Article number	093
Pages (from-to)	373-376
Number of pages	4
Journal	Journal of Physics: Conference Series
Volume	43
Issue number	1
DOIs	https://doi.org/10.1088/1742-6596/43/1/093
Publication status	Published - 2006 Jun 1

ASJC Scopus subject areas

Physics and Astronomy(all)

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title = "Microstructure and superconducting properties of meltprocessed RE-Ba-Cu-O with dispersed barium cerate particles",

abstract = "We studied microstructure and superconducting properties of melt-processed RE123 (REY and Dy) bulk superconductors with a large amount of BaCeO3 addition. The melttextured bulk samples with compositions of Y123 + xBaCeO 3 (x0.05-0.4) and 0.5 wt% of Pt were fabricated in air. The BaCeO3 particles with the diameter of 1-2 νm were trapped in the melt-textured samples. The critical current density (Jc) in a low field region increased with the amount of BaCeO3 inclusions. This suggests the BaCeO3 particles act as effective flux pinning centers, as well as Y211 particles in conventional melt-textured Y-Ba-Cu-O bulk materials. We found that the size of BaCeO3 particles could be reduced by substituting Zr on Ce site. The Y123 bulk sample with 30 mol% of Ba(Ce0.75Zr0.25)O3 and 0.5 wt% Pt showed a high Jc value of 110 kA/cm2 at 77 K. The Dy123 bulk samples dispersed BaCeO3 and Ba(Ce0.75Zr0.25)O 3 particles also exhibited excellent Jc-B properties.",

author = "S. Nariki and N. Sakai and M. Murakami and I. Hirabayashi",

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AU - Nariki, S.

AU - Sakai, N.

AU - Murakami, M.

AU - Hirabayashi, I.

PY - 2006/6/1

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N2 - We studied microstructure and superconducting properties of melt-processed RE123 (REY and Dy) bulk superconductors with a large amount of BaCeO3 addition. The melttextured bulk samples with compositions of Y123 + xBaCeO 3 (x0.05-0.4) and 0.5 wt% of Pt were fabricated in air. The BaCeO3 particles with the diameter of 1-2 νm were trapped in the melt-textured samples. The critical current density (Jc) in a low field region increased with the amount of BaCeO3 inclusions. This suggests the BaCeO3 particles act as effective flux pinning centers, as well as Y211 particles in conventional melt-textured Y-Ba-Cu-O bulk materials. We found that the size of BaCeO3 particles could be reduced by substituting Zr on Ce site. The Y123 bulk sample with 30 mol% of Ba(Ce0.75Zr0.25)O3 and 0.5 wt% Pt showed a high Jc value of 110 kA/cm2 at 77 K. The Dy123 bulk samples dispersed BaCeO3 and Ba(Ce0.75Zr0.25)O 3 particles also exhibited excellent Jc-B properties.

AB - We studied microstructure and superconducting properties of melt-processed RE123 (REY and Dy) bulk superconductors with a large amount of BaCeO3 addition. The melttextured bulk samples with compositions of Y123 + xBaCeO 3 (x0.05-0.4) and 0.5 wt% of Pt were fabricated in air. The BaCeO3 particles with the diameter of 1-2 νm were trapped in the melt-textured samples. The critical current density (Jc) in a low field region increased with the amount of BaCeO3 inclusions. This suggests the BaCeO3 particles act as effective flux pinning centers, as well as Y211 particles in conventional melt-textured Y-Ba-Cu-O bulk materials. We found that the size of BaCeO3 particles could be reduced by substituting Zr on Ce site. The Y123 bulk sample with 30 mol% of Ba(Ce0.75Zr0.25)O3 and 0.5 wt% Pt showed a high Jc value of 110 kA/cm2 at 77 K. The Dy123 bulk samples dispersed BaCeO3 and Ba(Ce0.75Zr0.25)O 3 particles also exhibited excellent Jc-B properties.

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Microstructure and superconducting properties of meltprocessed RE-Ba-Cu-O with dispersed barium cerate particles

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