Improvement of the microstructure of melt-processed Sm-based superconductors

K. Tazoe, H. Ikuta, M. Yoshikawa, Y. Yanagi, Y. Itoh, Tetsuo Oka, U. Mizutani

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

We report on the effect of the atmosphere during the decomposition of the precursors of Sm-Ba-Cu-O bulk superconductors. It was found that the formation of voids was greatly suppressed by two methods, melting in an oxygen gas atmosphere or in vacuum. For both methods, the atmosphere during crystallization was switched to an Ar gas flowing one. The samples prepared by these methods exhibited high superconducting transition temperatures with sharp transition widths. However, the zero-field critical current density was lower than that of the reference sample, which was prepared by decomposing the precursor in an Ar gas flowing atmosphere.

Original languageEnglish
Pages (from-to)807-810
Number of pages4
JournalPhysica C: Superconductivity and its Applications
Volume357-360
DOIs
Publication statusPublished - 2001 Jan 1
Externally publishedYes

Fingerprint

Superconducting materials
Gases
atmospheres
microstructure
Microstructure
gases
Crystallization
Superconducting transition temperature
Melting
Vacuum
Oxygen
Decomposition
voids
critical current
transition temperature
melting
crystallization
current density
decomposition
vacuum

Keywords

  • Melt-growth
  • Microstructure
  • Sm-Ba-Cu-O

ASJC Scopus subject areas

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

Cite this

Improvement of the microstructure of melt-processed Sm-based superconductors. / Tazoe, K.; Ikuta, H.; Yoshikawa, M.; Yanagi, Y.; Itoh, Y.; Oka, Tetsuo; Mizutani, U.

In: Physica C: Superconductivity and its Applications, Vol. 357-360, 01.01.2001, p. 807-810.

Research output: Contribution to journalArticle

Tazoe, K. ; Ikuta, H. ; Yoshikawa, M. ; Yanagi, Y. ; Itoh, Y. ; Oka, Tetsuo ; Mizutani, U. / Improvement of the microstructure of melt-processed Sm-based superconductors. In: Physica C: Superconductivity and its Applications. 2001 ; Vol. 357-360. pp. 807-810.
@article{5f29f2f13ade4d688c9b87c7f3a1b3a0,
title = "Improvement of the microstructure of melt-processed Sm-based superconductors",
abstract = "We report on the effect of the atmosphere during the decomposition of the precursors of Sm-Ba-Cu-O bulk superconductors. It was found that the formation of voids was greatly suppressed by two methods, melting in an oxygen gas atmosphere or in vacuum. For both methods, the atmosphere during crystallization was switched to an Ar gas flowing one. The samples prepared by these methods exhibited high superconducting transition temperatures with sharp transition widths. However, the zero-field critical current density was lower than that of the reference sample, which was prepared by decomposing the precursor in an Ar gas flowing atmosphere.",
keywords = "Melt-growth, Microstructure, Sm-Ba-Cu-O",
author = "K. Tazoe and H. Ikuta and M. Yoshikawa and Y. Yanagi and Y. Itoh and Tetsuo Oka and U. Mizutani",
year = "2001",
month = "1",
day = "1",
doi = "10.1016/S0921-4534(01)00370-7",
language = "English",
volume = "357-360",
pages = "807--810",
journal = "Physica C: Superconductivity and its Applications",
issn = "0921-4534",
publisher = "Elsevier",

}

TY - JOUR

T1 - Improvement of the microstructure of melt-processed Sm-based superconductors

AU - Tazoe, K.

AU - Ikuta, H.

AU - Yoshikawa, M.

AU - Yanagi, Y.

AU - Itoh, Y.

AU - Oka, Tetsuo

AU - Mizutani, U.

PY - 2001/1/1

Y1 - 2001/1/1

N2 - We report on the effect of the atmosphere during the decomposition of the precursors of Sm-Ba-Cu-O bulk superconductors. It was found that the formation of voids was greatly suppressed by two methods, melting in an oxygen gas atmosphere or in vacuum. For both methods, the atmosphere during crystallization was switched to an Ar gas flowing one. The samples prepared by these methods exhibited high superconducting transition temperatures with sharp transition widths. However, the zero-field critical current density was lower than that of the reference sample, which was prepared by decomposing the precursor in an Ar gas flowing atmosphere.

AB - We report on the effect of the atmosphere during the decomposition of the precursors of Sm-Ba-Cu-O bulk superconductors. It was found that the formation of voids was greatly suppressed by two methods, melting in an oxygen gas atmosphere or in vacuum. For both methods, the atmosphere during crystallization was switched to an Ar gas flowing one. The samples prepared by these methods exhibited high superconducting transition temperatures with sharp transition widths. However, the zero-field critical current density was lower than that of the reference sample, which was prepared by decomposing the precursor in an Ar gas flowing atmosphere.

KW - Melt-growth

KW - Microstructure

KW - Sm-Ba-Cu-O

UR - http://www.scopus.com/inward/record.url?scp=0035423351&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0035423351&partnerID=8YFLogxK

U2 - 10.1016/S0921-4534(01)00370-7

DO - 10.1016/S0921-4534(01)00370-7

M3 - Article

AN - SCOPUS:0035423351

VL - 357-360

SP - 807

EP - 810

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

SN - 0921-4534

ER -