Comparative study of magnetic fields trapped in YBa2Cu3Oy, and SmBa2Cu3Oy superconducting bulks

Ken Nagashima, Noriki Hayashi, Sang Im Yoo, Hiroyuki Fujimoto, Masato Murakami

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

We have measured the trapped field distribution in plates of melt processed YBa2Cu3Oy, (Y123) and SmBa2Cu3Oy, (Sm123) superconductors that have different field dependence of the critical current density (Jc). Sm123 materials were fabricated by the oxygen-controlled melt-growth (OCMG) process and exhibited the peak effect. The trapped fields were measured by scanning a Hall probe on the sample surface. Measurements were performed after a field of 3.5 T was applied in the field-cooled process. On the basis of the critical state model, the magnetic field distribution was calculated taking account of the field dependence of the critical current density. The calculated values were in good agreement with the measured data. We have also estimated trapped magnetic fields for Y123 and Sm123 when the grain size is enlarged, which showed that OCMG-processed Sm123 bulk superconductors have greater potential as trapped field magnets.

Original languageEnglish
Pages (from-to)164-168
Number of pages5
JournalMaterials Science and Engineering B
Volume53
Issue number1-2
Publication statusPublished - 1998 May 1
Externally publishedYes

Fingerprint

trapped magnetic fields
Superconducting materials
critical current
Critical current density (superconductivity)
Magnetic fields
current density
Oxygen
oxygen
Magnets
magnets
grain size
Scanning
scanning
probes
magnetic fields

Keywords

  • Bulk
  • Hall probe
  • OCMG process
  • SmBaCuO
  • Superconducting permanent magnets
  • Trapped field
  • YBaCuO

ASJC Scopus subject areas

  • Materials Science(all)
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Comparative study of magnetic fields trapped in YBa2Cu3Oy, and SmBa2Cu3Oy superconducting bulks. / Nagashima, Ken; Hayashi, Noriki; Yoo, Sang Im; Fujimoto, Hiroyuki; Murakami, Masato.

In: Materials Science and Engineering B, Vol. 53, No. 1-2, 01.05.1998, p. 164-168.

Research output: Contribution to journalArticle

Nagashima, Ken ; Hayashi, Noriki ; Yoo, Sang Im ; Fujimoto, Hiroyuki ; Murakami, Masato. / Comparative study of magnetic fields trapped in YBa2Cu3Oy, and SmBa2Cu3Oy superconducting bulks. In: Materials Science and Engineering B. 1998 ; Vol. 53, No. 1-2. pp. 164-168.
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