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

研究成果: Article査読

12 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)232-240
ページ数9
ジャーナルPhysica C: Superconductivity and its applications
383
3
DOI
出版ステータスPublished - 2002 12月 15
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • エネルギー工学および電力技術
  • 電子工学および電気工学

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