A study of Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub 7-x/ thick films on ferroelectric substrates

The goal of the study reported was to qualify the use of yttrium barium copper oxide films (the orthorhombic superconducting phase commonly referred to as one-two-three, termed as YBCO) as electrodes on ferroic materials for use in dielectric and piezoelectric devices. The substrates used were barium titanate (BT), lead zirconate titanate (PZT), and lead magnesium niobate-lead titanate (92.5PMN-7.5PT). The YBCO films were synthesized on the substrates by spin coating, spraying, screen-printing, and tape cast laminations. The dielectric loss data as a function of temperature and frequency of YBCO electrode samples indicate differing degrees of interfacial interaction. The coatings did not have a good adhesion on PMN-7.5PT. The interaction with BT was excessive. The PZT-YBCO system appears to be the most compatible with minimum adverse interactions and excellent adhesion properties without substantial loss of electrical properties.<
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