Surface-quality dependence of the low temperature magnetisation of YBa2Cu3O7

C Panagopoulos, W Zhou, N Athanassopoulou, J R Cooper

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19 Citations (Scopus)

Abstract

The effect of the surface structure and chemistry of YBa2Cu3O7 on the low temperature (T) low field susceptibility (chi) measurements was studied. Grinding sintered material in air into particles of average radius 5 mu m caused a small upturn in chi below 12 K and a larger effect was observed for smaller particles. These upturns could be removed by a suitable annealing treatment and a linear T dependence in chi, and consequently in the magnetic penetration depth was then observed. High resolution electron microscopy was used to monitor the corresponding changes in the surface structure of the particles.

Original languageEnglish
Pages (from-to)157-162
Number of pages6
JournalPhysica C: Superconductivity
Volume269
Issue number1-2
DOIs
Publication statusPublished - 20 Sept 1996

Keywords

  • magnetisation
  • penetration depth
  • HREM
  • d-wave superconductor
  • RESOLUTION ELECTRON-MICROSCOPY
  • GRAIN-BOUNDARIES
  • BA2YCU3O7-X
  • CHEMISTRY

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