Superconducting properties and microstructures of Er-Ba-Cu-O superconductor

K. Iida, J. Yoshioka, Naomichi Sakai, Masato Murakami

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The growth rate of Er-Ba-Cu-O bulk superconductor as a function for undercooling was investigated using an isothermal solidification technique. The behaviour of the growth rate of Er-Ba-Cu-O under various undercooling was similar to that of Y-Ba-Cu-O. Furthermore, macro-segregation of Er211 was also observed in the a and c growth regions. However, macro-segregation of Er211 was not observed in the Er123 crystal fabricated by a continual slow cooling method far from the seed crystal. The optimum concentration of Er211 was determined to be Er123:Er211 = 3:1 on the basis of microstructure analysis and SQUID measurements. Furthermore, the trapped field capability as well as the critical current density of Er-Ba-Cu-O bulk superconductor with an optimum composition fabricated by a continual slow cooling method employing very small particles of Er211 was dramatically improved.

Original languageEnglish
Pages (from-to)699-706
Number of pages8
JournalSuperconductor Science and Technology
Volume16
Issue number6
DOIs
Publication statusPublished - 2003 Jun
Externally publishedYes

Fingerprint

Undercooling
Superconducting materials
Macros
supercooling
Cooling
Crystals
microstructure
Microstructure
SQUIDs
Solidification
cooling
solidification
crystals
seeds
critical current
Chemical analysis
current density

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Superconducting properties and microstructures of Er-Ba-Cu-O superconductor. / Iida, K.; Yoshioka, J.; Sakai, Naomichi; Murakami, Masato.

In: Superconductor Science and Technology, Vol. 16, No. 6, 06.2003, p. 699-706.

Research output: Contribution to journalArticle

@article{8e9341f58ae5477bbe41feb356c97702,
title = "Superconducting properties and microstructures of Er-Ba-Cu-O superconductor",
abstract = "The growth rate of Er-Ba-Cu-O bulk superconductor as a function for undercooling was investigated using an isothermal solidification technique. The behaviour of the growth rate of Er-Ba-Cu-O under various undercooling was similar to that of Y-Ba-Cu-O. Furthermore, macro-segregation of Er211 was also observed in the a and c growth regions. However, macro-segregation of Er211 was not observed in the Er123 crystal fabricated by a continual slow cooling method far from the seed crystal. The optimum concentration of Er211 was determined to be Er123:Er211 = 3:1 on the basis of microstructure analysis and SQUID measurements. Furthermore, the trapped field capability as well as the critical current density of Er-Ba-Cu-O bulk superconductor with an optimum composition fabricated by a continual slow cooling method employing very small particles of Er211 was dramatically improved.",
author = "K. Iida and J. Yoshioka and Naomichi Sakai and Masato Murakami",
year = "2003",
month = "6",
doi = "10.1088/0953-2048/16/6/308",
language = "English",
volume = "16",
pages = "699--706",
journal = "Superconductor Science and Technology",
issn = "0953-2048",
publisher = "IOP Publishing Ltd.",
number = "6",

}

TY - JOUR

T1 - Superconducting properties and microstructures of Er-Ba-Cu-O superconductor

AU - Iida, K.

AU - Yoshioka, J.

AU - Sakai, Naomichi

AU - Murakami, Masato

PY - 2003/6

Y1 - 2003/6

N2 - The growth rate of Er-Ba-Cu-O bulk superconductor as a function for undercooling was investigated using an isothermal solidification technique. The behaviour of the growth rate of Er-Ba-Cu-O under various undercooling was similar to that of Y-Ba-Cu-O. Furthermore, macro-segregation of Er211 was also observed in the a and c growth regions. However, macro-segregation of Er211 was not observed in the Er123 crystal fabricated by a continual slow cooling method far from the seed crystal. The optimum concentration of Er211 was determined to be Er123:Er211 = 3:1 on the basis of microstructure analysis and SQUID measurements. Furthermore, the trapped field capability as well as the critical current density of Er-Ba-Cu-O bulk superconductor with an optimum composition fabricated by a continual slow cooling method employing very small particles of Er211 was dramatically improved.

AB - The growth rate of Er-Ba-Cu-O bulk superconductor as a function for undercooling was investigated using an isothermal solidification technique. The behaviour of the growth rate of Er-Ba-Cu-O under various undercooling was similar to that of Y-Ba-Cu-O. Furthermore, macro-segregation of Er211 was also observed in the a and c growth regions. However, macro-segregation of Er211 was not observed in the Er123 crystal fabricated by a continual slow cooling method far from the seed crystal. The optimum concentration of Er211 was determined to be Er123:Er211 = 3:1 on the basis of microstructure analysis and SQUID measurements. Furthermore, the trapped field capability as well as the critical current density of Er-Ba-Cu-O bulk superconductor with an optimum composition fabricated by a continual slow cooling method employing very small particles of Er211 was dramatically improved.

UR - http://www.scopus.com/inward/record.url?scp=0037561521&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0037561521&partnerID=8YFLogxK

U2 - 10.1088/0953-2048/16/6/308

DO - 10.1088/0953-2048/16/6/308

M3 - Article

AN - SCOPUS:0037561521

VL - 16

SP - 699

EP - 706

JO - Superconductor Science and Technology

JF - Superconductor Science and Technology

SN - 0953-2048

IS - 6

ER -