Disappearance of bose-glass behavior in transport properties of YBa2Cu3Oy films with columnar defects

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

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The glass transitions of the vortex system in Au-ion irradiated YBa2Cu3Oy films have been studied by the measurements of transport properties as a function of magnetic field B and angle Θ of B to the direction of columnar defects. At χ = 0°, we find an anomalous upturn behavior of the glass transition line Bg(T) at B ∼ BΦ/3, where Bos is the matching field. In B > BΦ/3, the χ dependence of glass transition temperature Tg reveals cusplike behavior with a peak at χ = 0°, which is consistent with the Bose glass theory. In B < BΦ/3, on the other hand, Tg is almost independent of χ, suggesting the system undergoes the vortex glass transition induced by the inherent point-like defects.

Original languageEnglish
Pages (from-to)859-863
Number of pages5
JournalJournal of Low Temperature Physics
Volume131
Issue number5-6
DOIs
Publication statusPublished - 2003 Jun

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics

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