Surface acoustic wave measurements of YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} thin films and single crystals
- Physics Department, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin 53201 (United States)
Surface acoustic wave (SAW) velocity and attenuation measurements have been performed on high-temperature superconducting YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} (YBCO) thin films (deposited on nonpiezoelectric substrates), and YBCO single crystals. A {open_quotes}bridge{close_quotes} technique is employed in which piezoelectric substrates, patterned with interdigital transducers, are bonded to the sample under investigation. The temperature dependence of 168 MHz SAW attenuation in a single crystal near its superconducting transition has been measured in applied magnetic fields up to 1.6 T. Features are seen above the superconducting transition temperature which may be indicative of a transition in the electric polarization of the material. A field-dependent attenuation peak, seen in the superconducting state, is discussed in terms of the theory of thermally activated vortex motion. {copyright} {ital 1997 American Institute of Physics.}
- OSTI ID:
- 495848
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 11 Vol. 70; ISSN APPLAB; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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