Non-universal glass scaling behavior in transport properties of YBa2Cu3Oy films with columnar defects

T. Nojima, M. Katakura, S. Okayasu, N. Kobayashi

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Vortex phase diagrams have been studied on heavy-ion irradiated YBa2Cu3Oy films by the measurements of current-voltage (I-V) characteristics, resistance R and critical current density Jc as a function of magnetic field B parallel to the columnar defects. In the scaling analyses of the I-V data, we find the non-universal nature of the glass transition. The dynamic critical exponent z, which is almost constant at high fields, shows an anomalous peak and the glass transition line Tg(B) reveals an upturn behavior at B ∼ Bφ/3 with Bφ the matching field, where we also observe step-like behavior both in R(B) and Jc(B) curves. These results indicate the existence of a temperature-independent boundary in the B-T plane at which the dissipation mechanism changes.

Original languageEnglish
Pages (from-to)593-597
Number of pages5
JournalPhysica C: Superconductivity and its applications
Volume378-381
Issue numberPART 1
DOIs
Publication statusPublished - 2002 Oct 1

Keywords

  • Bose glass transition
  • Columnar defects
  • I-V characteristics
  • Vortex glass transition
  • YBaCuO films

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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