New insulating material for YBa2Cu3Ox/Insulator/YBa2Cu3Ox tunnel junctions

Yasuo Tazoh, Masashi Mukaida, Shitaro Miyazawa

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1 Citation (Scopus)

Abstract

BaSnO3 is proposed as a new insulating material for YBCO-SIS tunnel junctions from the viewpoint of the superconducting behavior of a layer-structured YBCO. YBCO and BaSnO3 thin films were grown in-situ by a reactive co-evaporation in oxygen radicals. XRD, AFM, and RHEED observations confirm that (001) oriented YBCO and (100) oriented BaSnO3 thin films grow epitaxially on each other. Cross-sectional TEM observations reveal that about 4 nm thick BaSnO3 thin films perfetly cover the lower YBCO thin film surface steps with a height of one unit cell length of YBCO. Tc of the lower and upper YBCO thin films is higher that 80 K.

Original languageEnglish
Pages (from-to)3343-3344
Number of pages2
JournalPhysica C: Superconductivity and its applications
Volume235-240
Issue numberPART 5
DOIs
Publication statusPublished - Dec 1994
Externally publishedYes

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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