%0 Conference Paper
%K pulsed laser deposition
%K yttrium compounds
%K copper oxides
%K heterostructures
%K High temperature superconductors
%K Transport properties
%K Yttrium barium copper oxides
%K Laser Beams–Applications
%A Arun Inam
%A Charles Rogers
%A Ramamoorthy Ramesh
%A K.E Myers
%A J Barner
%A B.J Wilkens
%A K.S Harshavardhan
%A M Rajeswari
%A S Bersey
%A L Gertner
%A Shahab Etemad
%A Tim Sands
%A J.M Tarascon
%A Rajendra Singh
%A Martin Nisenoff
%A Davor Pavuna
%B Proceedings of SPIE - The International Society for Optical Engineering
%D 1992
%G eng
%I Publ by Int Soc for Optical Engineering, Bellingham, WA, United States
%P 101-107
%T Artificially layered YBa2Cu3O7-PrBa2Cu3O7 heterostructures; growth, properties, and device applications (Invited Paper)
%V 1597
%@ 0819407283
%X <p>We have investigated the influence of interface effects and CuO2 plane orientation on transport properties of high temperature superconducting (HTS) thin films in YBa2 Cu3O7-PrBa2Cu3O7 (YBCO-PrBCO) heterostructures grown by pulsed laser deposition. Two unit cell (≈ 24 angstroms) thick YBCO films, isolated in c-axis oriented PrBCO/YBCO/PrBCO trilayers, are found to superconduct at temperatures above 20 K, while films thicker than 6 unit cells display bulk superconducting properties. An epitaxial process has also been developed to grow YBCO films and YBCO/PrBCO heterostructures with the CuO2 planes oriented normal to the film surface. These a-axis oriented films display transport properties comparable to the best c-axis oriented films and, moreover, are better suited to the fabrication of sandwich-type Josephson junction devices by virtue of the longer superconductive coherence length normal to the direction of the YBCO-PrBCO barrier interface.</p>