Dimensionality and irreversibility field in YBa2Cu3O7 films

Satoshi Awaji, Kazuo Watanabe, N. Kobayashi, Hisanori Yamane, T. Hirai

Research output: Contribution to journalArticlepeer-review

Abstract

In order to investigate the relationship between the flux pinning and dimensionality, the critical current density Jc for YBa2Cu3O7 films was measured as a function of temperature, field and tilt angle between field and c-axis. The kink anomaly in the temperature dependence of Jc for B⊥c was observed as the dimensional crossover from 3D extrinsic pinning to 2D intrinsic pinning. The irreversibility field Bi for B//c was measured in fields up to 23T and estimated to be 90T at 30K using the scaling law of the pinning force densities. The enhancement of Bi from a power law (1-T/Tc)n with n≃1.5 for B//c was observed below 40K. This suggests the formation of the 2-dimensional pancake vortex in YBa2Cu3O7.

Original languageEnglish
Pages (from-to)333-337
Number of pages5
JournalScience Reports of the Rerearch Institutes Tohoku University Series A-Physics
Volume42
Issue number2
Publication statusPublished - 1996 May 1

Keywords

  • Critical current density
  • Dimensional crossover
  • Intrinsic pinning
  • Irreversibility field
  • YBaCuO film

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Metals and Alloys

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