Enhanced transport properties in YBa2Cu3Ox films with crossed columnar defects of various inclination angles

J. H. Park, D. H. Kim, S. Y. Shim, Y. H. Kim, J. M. Lee, T. S. Hahn, J. D. Hettinger, D. G. Steel, K. E. Gray, B. Glagola, J. Lee, Z. G. Khim

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15 Scopus citations


We have studied the effect of heavy-ion irradiation on the transport properties of YBa2Cu3Ox thin films. Columnar defects parallel to the c axis (0°) and crossed columnar defects with various inclination angles (θ= ± 10°, ± 20°, and ± 40°) were introduced into films by 1.3 GeV U-ion irradiation with dose equivalent to 1 T vortex density. Transport properties including irreversibility fields, activation energies, and critical current densities have been measured in magnetic fields applied parallel to the c axis. The best transport properties were observed in samples of θ = ± 10° in most of the H-T plane we studied, consistent with the splay model. However, the relative enhancement of the critical current density in the θ= ± 10° compared to the 0° sample was not as large as in the case of a single crystal suggesting that in films the point defects also play an important part in flux pinning.

Original languageEnglish (US)
Pages (from-to)310-316
Number of pages7
JournalPhysica C: Superconductivity and its applications
Issue number4
StatePublished - Aug 10 1997

All Science Journal Classification (ASJC) codes

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


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