Comparative study of sequential neutron irradiation and annealing effects in superconducting YBa2Cu3O7-δ, Y2Ba4Cu8O16 and NdBa2Cu3O7-δ single crystals

M. Zehetmayer, F. M. Sauerzopf, H. W. Weber, J. Karpinski, M. Murakami

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

NdBa2Cu3O7-δ (Nd-123) and Y2Ba4Cu8O16 (Y-124) single crystals were sequentially irradiated with fast neutrons and annealed in air at 250 °C. After each treatment the transition temperature (Tc) and the field dependence of the magnetic moment with the field applied parallel to the crystallographic c-axis were measured at various temperatures by SQUID magnetometry. The results are compared with those on a previously investigated YBa2Cu3O7-δ (Y-123) single crystal. The behaviour of the transition temperature is well established for Y-123, i.e. Tc decreases due to irradiation and increases due to annealing. We find a similar effect for Y-124, but a completely different behaviour of Nd-123. The critical current density (Jc) increases for all samples after an irradiation step and becomes smaller after annealing. We show that the influence of the defects created by irradiation on Tc and Jc strongly depends on the as-grown defect structure. Jc after irradiation is rather a function of the neutron fluence since the last annealing step than a function of the overall dose.

Original languageEnglish
Pages (from-to)232-240
Number of pages9
JournalPhysica C: Superconductivity and its applications
Volume383
Issue number3
DOIs
Publication statusPublished - 2002 Dec 15

Keywords

  • Nd-123
  • Neutron irradiation
  • Y-123
  • Y-124

ASJC Scopus subject areas

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

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