Angular dependence of flux pinning in high-Tc superconducting films

H. E. Horng, H. H. Sung, B. C. Yao, H. C. Yang

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We have investigated the angular dependence of the dissipative characteristics of YBa2>Cu3>O7-y(>YBCO) and >Bi2>Sr2>CaCu2>O8-y(>BSCCO) films by measuring the resistivity in a field. The dissipation can be described by the thermal activated flux creep model, >R=RO exp(-U(H,T,θ)/kBT). U depends on the magnetic field as well as the angle, θ, the magnetic field makes with the c-axis. We found that the activation energy of YBCO films decreases by a factor of 2 while that of BSCCO films decreases by a factor of about 10 in >H = 5.5>T and at >T/Tc = 0.93 as one varies θ from 90° to 0°, where θ is the angle between the c axis and the direction of the field.

Original languageEnglish
Pages (from-to)2221-2222
Number of pages2
JournalPhysica C: Superconductivity and its applications
Volume185-189
Issue numberPART 4
DOIs
Publication statusPublished - 1991 Dec 1

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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