New superconducting Sr2CuO4-δ thin films prepared by molecular beam epitaxy

Shin-ichi Karimoto, Hideki Yamamoto, Tine Greibe, Michio Naito

Research output: Contribution to journalJournal articleResearchpeer-review


We report the synthesis of new superconducting Sr2CUO4-delta thin films (T-c(onset) similar to 75 K) using molecular beam epitaxy (MBE). This superconductor has a tetragonal structure with an in-plane lattice constant a(o) similar to 3.79 Angstrom and a c-axis lattice constant c(o) similar to 13.55 Angstrom. This c-axis lattice constant is significantly larger than previously reported for this system. Strong oxidation using ozone gas at a low temperature of around 350 degreesC is essential to the realization of phase conversion from the orthorhombic insulating phase (Sr2CuO3) to the tetragonal superconducting phase (Sr2CuO4-delta).
Original languageEnglish
JournalJapanese Journal of Applied Physics
Issue number2B
Pages (from-to)L127-L130
Publication statusPublished - 2001
Externally publishedYes


  • High-T-c superconductor
  • Thin film
  • Sr2CuO4-delta
  • Sr2CuO3+delta
  • Molecular beam epitaxy
  • Oxidation
  • Ozone
  • K2NiF4
  • 0201
  • 02(n-1)n
  • Homologous series


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