Melt processing of La-Ba-Cu-O superconductors with high Tc

N. Sakai; S. Goshima; M. Kawaguchi; S. I. Yoo; M. Murakami

doi:10.1016/S0921-5107(97)00312-7

Melt processing of La-Ba-Cu-O superconductors with high T_c

N. Sakai, S. Goshima, M. Kawaguchi, S. I. Yoo, M. Murakami

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

3 Citations (Scopus)

Abstract

We have successfully melt-processed La-Ba-Cu-O bulk superconductors which exhibit high T_C and large J_C values. The employment of a 0.1% O₂-Ar atmosphere and a Ba-rich La_{4 - x}Ba_{2 + x}Cu_{2 - x}O_{10 - 2x} second phase as a precursor was the key to obtaining a high T_C phase. Fabricated bulk samples exhibit onset T_C of 94 K and the secondary peak effect in the J_C -B curve. The respective peak position and the irreversibility field were 1 T and 4.5 T at 77 K and the J_C at the peak field was about 18000 A cm_-2.

Original language	English
Pages (from-to)	109-114
Number of pages	6
Journal	Materials Science and Engineering B
Volume	53
Issue number	1-2
DOIs	https://doi.org/10.1016/S0921-5107(97)00312-7
Publication status	Published - 1998 May 1
Externally published	Yes

Keywords

Critical current density
La-Ba-Cu-O
Melt process
Phase diagram
Solid solution
Superconductor

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1016/S0921-5107(97)00312-7

Cite this

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title = "Melt processing of La-Ba-Cu-O superconductors with high Tc",

abstract = "We have successfully melt-processed La-Ba-Cu-O bulk superconductors which exhibit high TC and large JC values. The employment of a 0.1% O2-Ar atmosphere and a Ba-rich La4 - xBa2 + xCu2 - xO10 - 2x second phase as a precursor was the key to obtaining a high TC phase. Fabricated bulk samples exhibit onset TC of 94 K and the secondary peak effect in the JC -B curve. The respective peak position and the irreversibility field were 1 T and 4.5 T at 77 K and the JC at the peak field was about 18000 A cm-2.",

keywords = "Critical current density, La-Ba-Cu-O, Melt process, Phase diagram, Solid solution, Superconductor",

author = "N. Sakai and S. Goshima and M. Kawaguchi and Yoo, {S. I.} and M. Murakami",

note = "Funding Information: This work was partially supported by NED0 for the R and D Industrial Science and Technology Frontier Program.",

year = "1998",

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doi = "10.1016/S0921-5107(97)00312-7",

language = "English",

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pages = "109--114",

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publisher = "Elsevier BV",

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TY - JOUR

T1 - Melt processing of La-Ba-Cu-O superconductors with high Tc

AU - Sakai, N.

AU - Goshima, S.

AU - Kawaguchi, M.

AU - Yoo, S. I.

AU - Murakami, M.

N1 - Funding Information: This work was partially supported by NED0 for the R and D Industrial Science and Technology Frontier Program.

PY - 1998/5/1

Y1 - 1998/5/1

N2 - We have successfully melt-processed La-Ba-Cu-O bulk superconductors which exhibit high TC and large JC values. The employment of a 0.1% O2-Ar atmosphere and a Ba-rich La4 - xBa2 + xCu2 - xO10 - 2x second phase as a precursor was the key to obtaining a high TC phase. Fabricated bulk samples exhibit onset TC of 94 K and the secondary peak effect in the JC -B curve. The respective peak position and the irreversibility field were 1 T and 4.5 T at 77 K and the JC at the peak field was about 18000 A cm-2.

AB - We have successfully melt-processed La-Ba-Cu-O bulk superconductors which exhibit high TC and large JC values. The employment of a 0.1% O2-Ar atmosphere and a Ba-rich La4 - xBa2 + xCu2 - xO10 - 2x second phase as a precursor was the key to obtaining a high TC phase. Fabricated bulk samples exhibit onset TC of 94 K and the secondary peak effect in the JC -B curve. The respective peak position and the irreversibility field were 1 T and 4.5 T at 77 K and the JC at the peak field was about 18000 A cm-2.

KW - Critical current density

KW - La-Ba-Cu-O

KW - Melt process

KW - Phase diagram

KW - Solid solution

KW - Superconductor

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