Barium cerate as effective flux pinning centers in Y123 bulk materials

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

doi:10.1016/j.physc.2005.05.024

Barium cerate as effective flux pinning centers in Y123 bulk materials

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

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

11 Citations (Scopus)

Abstract

Bulk superconductors with compositions of YBa₂Cu ₃O_y + xBaCeO₃ (x = 0.05-0.5) and 0.5 wt.% Pt were fabricated by melt processing in air. BaCeO₃ particles of 1-2 μm diameter were dispersed in the Y123 matrix, and critical current density (J_c) increased with the amount of BaCeO₃ for the sample with x = 0.05-0.3. We also 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_0.75, Zr_0.25)O₃ and 0.5 wt.% Pt showed a high J_c value of 110 kA/cm² at 77 K, where the Ba(Ce, Zr)O₃ inclusions were reduced to less than 1 μm in size. However, excess substitution of Zr led to inhomogeneous distribution of the additives and lowered J_c values.

Original language	English
Pages (from-to)	602-607
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.2005.05.024
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

BaCeO
Critical current density
Melt-textured bulk
Microstructure
Y-Ba-Cu-O

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.2005.05.024

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title = "Barium cerate as effective flux pinning centers in Y123 bulk materials",

abstract = "Bulk superconductors with compositions of YBa2Cu 3Oy + xBaCeO3 (x = 0.05-0.5) and 0.5 wt.% Pt were fabricated by melt processing in air. BaCeO3 particles of 1-2 μm diameter were dispersed in the Y123 matrix, and critical current density (Jc) increased with the amount of BaCeO3 for the sample with x = 0.05-0.3. We also 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(Ce0.75, Zr0.25)O3 and 0.5 wt.% Pt showed a high Jc value of 110 kA/cm2 at 77 K, where the Ba(Ce, Zr)O3 inclusions were reduced to less than 1 μm in size. However, excess substitution of Zr led to inhomogeneous distribution of the additives and lowered Jc values.",

keywords = "BaCeO, Critical current density, Melt-textured bulk, Microstructure, Y-Ba-Cu-O",

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

year = "2005",

month = oct,

day = "1",

doi = "10.1016/j.physc.2005.05.024",

language = "English",

volume = "426-431",

pages = "602--607",

journal = "Physica C: Superconductivity and its Applications",

issn = "0921-4534",

publisher = "Elsevier",

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TY - JOUR

T1 - Barium cerate as effective flux pinning centers in Y123 bulk materials

AU - Nariki, S.

AU - Sakai, N.

AU - Murakami, M.

AU - Hirabayashi, I.

PY - 2005/10/1

Y1 - 2005/10/1

N2 - Bulk superconductors with compositions of YBa2Cu 3Oy + xBaCeO3 (x = 0.05-0.5) and 0.5 wt.% Pt were fabricated by melt processing in air. BaCeO3 particles of 1-2 μm diameter were dispersed in the Y123 matrix, and critical current density (Jc) increased with the amount of BaCeO3 for the sample with x = 0.05-0.3. We also 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(Ce0.75, Zr0.25)O3 and 0.5 wt.% Pt showed a high Jc value of 110 kA/cm2 at 77 K, where the Ba(Ce, Zr)O3 inclusions were reduced to less than 1 μm in size. However, excess substitution of Zr led to inhomogeneous distribution of the additives and lowered Jc values.

AB - Bulk superconductors with compositions of YBa2Cu 3Oy + xBaCeO3 (x = 0.05-0.5) and 0.5 wt.% Pt were fabricated by melt processing in air. BaCeO3 particles of 1-2 μm diameter were dispersed in the Y123 matrix, and critical current density (Jc) increased with the amount of BaCeO3 for the sample with x = 0.05-0.3. We also 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(Ce0.75, Zr0.25)O3 and 0.5 wt.% Pt showed a high Jc value of 110 kA/cm2 at 77 K, where the Ba(Ce, Zr)O3 inclusions were reduced to less than 1 μm in size. However, excess substitution of Zr led to inhomogeneous distribution of the additives and lowered Jc values.

KW - BaCeO

KW - Critical current density

KW - Melt-textured bulk

KW - Microstructure

KW - Y-Ba-Cu-O

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U2 - 10.1016/j.physc.2005.05.024

DO - 10.1016/j.physc.2005.05.024

M3 - Conference article

AN - SCOPUS:25644456770

SN - 0921-4534

VL - 426-431

SP - 602

EP - 607

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 -

Barium cerate as effective flux pinning centers in Y123 bulk materials

Abstract

Keywords

ASJC Scopus subject areas

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