A comparison of the irreversibility line between melt-processed Nd-Ba-Cu-O and Y-Ba-Cu-O superconductors

K. Waki, T. Higuchi, S. I. Yoo, Masato Murakami

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

In the present work, we have performed a detailed comparative study of the irreversibility line (IL) among flux-grown NdBa2Cu3O7-d (Nd123) single crystal, melt-grown Nd-Ba-Cu-O (NdBCO) and melt-grown Y-Ba-Cu-O (YBCO) bulks by d.c. magnetometry and a.c. susceptometry. ILs were determined by measuring d.c. magnetization hysteresis loops, the fundamental χ1 and third harmonic χ3 signals of a.c. susceptibility for the fields parallel to the c-axis of samples (H//c). Among these, melt processed NdBCO exhibited the highest IL. On reduced temperature scale, however, ILs from the χ3 signals for melt-grown NdBCO and YBCO tended to merge together, suggesting that real depinning lines are insensitive to the field-induced flux pinning centers existing in NdBCO, including the fluxgrown sample, but are rather sensitive to the secondary phase inclusions existing in melt-grown samples.

Original languageEnglish
Pages (from-to)133-138
Number of pages6
JournalApplied Superconductivity
Volume5
Issue number1-6
Publication statusPublished - 1997 Jan
Externally publishedYes

Fingerprint

Temperature scales
Flux pinning
YBCO superconductors
Hysteresis loops
Superconducting materials
Magnetization
Single crystals
Fluxes
temperature scales
flux pinning
magnetic measurement
hysteresis
inclusions
magnetic permeability
harmonics
magnetization
single crystals
Magnetometry

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

A comparison of the irreversibility line between melt-processed Nd-Ba-Cu-O and Y-Ba-Cu-O superconductors. / Waki, K.; Higuchi, T.; Yoo, S. I.; Murakami, Masato.

In: Applied Superconductivity, Vol. 5, No. 1-6, 01.1997, p. 133-138.

Research output: Contribution to journalArticle

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