EFFECT OF FORMING PRESSURE ON THE CRITICAL-TEMPERATURE IN YBA2CU3O7-DELTA SUPERCONDUCTORS

ALSHIBANI K., ALAQL A., ALMUEZZIN A., HUMEIDA H., NAKHMEDOV E., FIRAT T., ...More

PHYSICA STATUS SOLIDI B-BASIC RESEARCH, vol.189, no.1, pp.177-184, 1995 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 189 Issue: 1
  • Publication Date: 1995
  • Doi Number: 10.1002/pssb.2221890120
  • Journal Name: PHYSICA STATUS SOLIDI B-BASIC RESEARCH
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.177-184
  • Istanbul Technical University Affiliated: No

Abstract

The effect of pressure on the critical temperature T-c is studied for YBa2Cu3O7-delta compounds prepared under various forming pressures. A systematic decrease in lattice parameters is observed with forming pressure. Resistivity measurements show an increase of the onset temperature T-c0 with forming pressure. A value of dT(c0)/dP approximate to (0.070 +/- 0.010) x 10(-8) K/Pa is determined. A new mechanism based on the variation of the interlayer tunneling integral t(perpendicular to) is used to analyse the experiment results.