Current-voltage characteristics of YBa2Cu3O7-δ films at low magnetic fields

T. Nojima, T. Ishida, Y. Kuwasawa

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


We have examined the scaling behavior and the functional form of the I-V characteristics of YBa2Cu3O7-δ films at fields H from 0.001 to 6 T applied parallel to the c-axis. In all cases, the I-V curves obey the scaling law based on the second-order phase transition, and are fitted by V/I = R0 exp[-(I0/I)μ]. At high fields, the exponents v, z, and μ, are independent of H and are consistent with the prediction of the vortex-glass (VG) model. However, below ∼0.05 T, these exponents become H-dependent, which is indicative of the existence of another phase at low fields.

Original languageEnglish
Pages (from-to)424-427
Number of pages4
JournalPhysica C: Superconductivity and its applications
Issue number1-4
Publication statusPublished - 1996 May
Externally publishedYes

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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