Microstructure and superconducting properties of Dy-Ba-Cu-O bulk superconductors fabricated in different oxygen atmospheres

H. Tanaka; S. Nariki; N. Sakai; I. Hirabayashi; M. Murakami; T. Takizawa

doi:10.1016/j.physc.2005.02.068

Microstructure and superconducting properties of Dy-Ba-Cu-O bulk superconductors fabricated in different oxygen atmospheres

H. Tanaka, S. Nariki, N. Sakai, I. Hirabayashi, M. Murakami, T. Takizawa

Research output: Contribution to journal › Conference article › peer-review

15 Citations (Scopus)

Abstract

We have investigated the effect of microstructure and superconducting properties of melt-textured Dy-Ba-Cu-O bulk superconductors on various oxygen partial pressures in melt processing. The c-axis-oriented Dy-Ba-Cu-O bulk superconductors are melt textured in 1% O₂-Ar, air and pure O ₂. It is found that the distribution of voids in the microstructure depends on oxygen pressures. The number of voids decreases in a sample fabricated in O₂. The peak effect is observed in J_c-B curves of these samples except for the sample fabricated in 1% O₂. Such behavior is similar to those found in Nd- and Sm-Ba-Cu-O. These results indicate the possibility of the Dy/Ba substitution.

Original language	English
Pages (from-to)	660-665
Number of pages	6
Journal	Physica C: Superconductivity and its applications
Volume	426-431
Issue number	I
DOIs	https://doi.org/10.1016/j.physc.2005.02.068
Publication status	Published - 2005 Oct 1
Event	Proceedings of the 17th International Symposium on Superconductivity (ISS 2004) Advances in Supeconductivity - Duration: 2004 Nov 23 → 2004 Nov 25

Keywords

Bulk superconductor
Dy-Ba-Cu-O
Melt processing
Microstructure

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1016/j.physc.2005.02.068

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title = "Microstructure and superconducting properties of Dy-Ba-Cu-O bulk superconductors fabricated in different oxygen atmospheres",

abstract = "We have investigated the effect of microstructure and superconducting properties of melt-textured Dy-Ba-Cu-O bulk superconductors on various oxygen partial pressures in melt processing. The c-axis-oriented Dy-Ba-Cu-O bulk superconductors are melt textured in 1% O2-Ar, air and pure O 2. It is found that the distribution of voids in the microstructure depends on oxygen pressures. The number of voids decreases in a sample fabricated in O2. The peak effect is observed in Jc-B curves of these samples except for the sample fabricated in 1% O2. Such behavior is similar to those found in Nd- and Sm-Ba-Cu-O. These results indicate the possibility of the Dy/Ba substitution.",

keywords = "Bulk superconductor, Dy-Ba-Cu-O, Melt processing, Microstructure",

author = "H. Tanaka and S. Nariki and N. Sakai and I. Hirabayashi and M. Murakami and T. Takizawa",

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TY - JOUR

T1 - Microstructure and superconducting properties of Dy-Ba-Cu-O bulk superconductors fabricated in different oxygen atmospheres

AU - Tanaka, H.

AU - Nariki, S.

AU - Sakai, N.

AU - Hirabayashi, I.

AU - Murakami, M.

AU - Takizawa, T.

PY - 2005/10/1

Y1 - 2005/10/1

N2 - We have investigated the effect of microstructure and superconducting properties of melt-textured Dy-Ba-Cu-O bulk superconductors on various oxygen partial pressures in melt processing. The c-axis-oriented Dy-Ba-Cu-O bulk superconductors are melt textured in 1% O2-Ar, air and pure O 2. It is found that the distribution of voids in the microstructure depends on oxygen pressures. The number of voids decreases in a sample fabricated in O2. The peak effect is observed in Jc-B curves of these samples except for the sample fabricated in 1% O2. Such behavior is similar to those found in Nd- and Sm-Ba-Cu-O. These results indicate the possibility of the Dy/Ba substitution.

AB - We have investigated the effect of microstructure and superconducting properties of melt-textured Dy-Ba-Cu-O bulk superconductors on various oxygen partial pressures in melt processing. The c-axis-oriented Dy-Ba-Cu-O bulk superconductors are melt textured in 1% O2-Ar, air and pure O 2. It is found that the distribution of voids in the microstructure depends on oxygen pressures. The number of voids decreases in a sample fabricated in O2. The peak effect is observed in Jc-B curves of these samples except for the sample fabricated in 1% O2. Such behavior is similar to those found in Nd- and Sm-Ba-Cu-O. These results indicate the possibility of the Dy/Ba substitution.

KW - Bulk superconductor

KW - Dy-Ba-Cu-O

KW - Melt processing

KW - Microstructure

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VL - 426-431

SP - 660

EP - 665

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - I

T2 - Proceedings of the 17th International Symposium on Superconductivity (ISS 2004) Advances in Supeconductivity

Y2 - 23 November 2004 through 25 November 2004

ER -

Microstructure and superconducting properties of Dy-Ba-Cu-O bulk superconductors fabricated in different oxygen atmospheres

Abstract

Keywords

ASJC Scopus subject areas

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