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Barrier Technology For Dyba2Cu3O7-x Junctions And Related Structures

  • K. M. Beauchamp
  • , Y. J. Zhang
  • , B. R. Johnson
  • , R. K. Schultz
  • , G. C. Spalding
  • , M. Tsen
  • , T. Wang
  • , J. F. Evans
  • , M. L. Mecartney
  • , A. M. Goldman

Research output: Contribution to journalArticlepeer-review

Abstract

Layered structures which include the high-temperature superconductor DyBa2Cu3O7-x have been fabricated using molecular beam epitaxy with ozone as the activated oxygen source. A c-axis oriented DyBa2Cu3O7-xthin film with a Tc of 74 K has been grown on a layer of the rare earth sesquioxide DY2O3 on a (100) oriented SrTiO3 substrate. DY2O3 has also been incorporated as a barrier between two layers of DyBa2Cu3O7-x where the Tc of the top layer is 89 K. X-ray diffraction reveals oriented growth of both the DyBa2Cu3O7-x and the DY2O3 layers. Cross-sectional transmission electron microscopy clearly shows the detailed matching of the layers, demonstrating that the interfaces are abrupt, with {100} DY2O3 planes parallel to {001} DyBa2Cu3O7-x planes. These results are a strong indication that high quality, all high-Tc superconductor tunneling junctions can be fabricated in this system.

Original languageEnglish (US)
Pages (from-to)3090-3093
Number of pages4
JournalIEEE Transactions on Magnetics
Volume27
Issue number2
DOIs
StatePublished - Mar 1991

Bibliographical note

Funding Information:
This work was supported in part by the AFOSR under Grant 87-0372, by the NSF Materials Research Group Program under Grant NSF/DMR-89-08094, by the Minnesota Department of Administration, and by the Central Administration of the University of Minnesota.

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