Oxygen annealing and superconductivity of HgBa2Ca2Cu3O8+y thin films

W. N. Kang, Sung Ik Lee, C. W. Chu

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


We studied the effects of oxygen-annealing temperature on the superconductivity of epitaxial HgBa2Ca2Cu3O8+y thin films fabricated by pulsed laser deposition. The highest transition temperature of 133 K for the films grown on (100) SrTiO3 was obtained after oxygen annealing at 340 °C for 12 h. The observed critical current density of 1.9×107 A/cm2 at 10 K, and 2.6×105 A/cm2 at 120 K in zero-field is high enough for the application of the superconducting quantum interference devices (SQUIDs) operated at 120 K. A dimensional crossover from 3D to 2D vortex states is observed from the temperature dependence of the irreversibility line.

Original languageEnglish
Pages (from-to)223-226
Number of pages4
JournalPhysica C: Superconductivity and its applications
Issue number3
Publication statusPublished - 1999 Apr 20

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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