The Effects of Sb Substitution on Structural Properties in YBa2Cu3O7 Superconductors

AKYÜZ G. B., KOCABAŞ K., Yildiz A., Ozyuzer L., Ciftcioglu M.

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM, cilt.24, sa.8, ss.2189-2201, 2011 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 24 Sayı: 8
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1007/s10948-011-1180-y
  • Dergi Adı: JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.2189-2201
  • Anahtar Kelimeler: Y-based cuprates, Effects of substitution, SEM, BEHAVIOR, TEMPERATURE
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

In this study, the effects of partial Sb3+ ion substitutions for the Y sites and the Cu sites on the superconducting properties of YBa2Cu3O (y) (Y123) ceramic superconductors were investigated. The samples were prepared by the conventional solid-state reaction method and the properties of the samples were investigated by means of X-ray diffraction, AC magnetic susceptibility measurements, scanning electron microscope, and energy dispersive X-ray analysis. The critical temperatures were determined to be in the range of 80-92 K for both Systems I and II. It was found that Sb-addition leads to the formation of the non-superconducting YBa2SbO6 phase, which has a negative effect on the critical temperature, since the highest critical temperature was measured for pure Y123. However, the increasing substitution level has a negligible effect on the X-ray diffraction analysis peak intensities of the superconducting phases. In addition, SEM images showed that Sb substitution decreases the grain size and modifies the microstructure development, which makes the samples denser.