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 language | English (US) |
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Pages (from-to) | 3090-3093 |
Number of pages | 4 |
Journal | IEEE Transactions on Magnetics |
Volume | 27 |
Issue number | 2 |
DOIs | |
State | Published - 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.