Elastic and nonlinear acoustic properties of YBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}} ceramics with different oxygen contents
- Schools of Physics and Material Science, University of Bath, Claverton Down, Bath BA2 7AY (United Kingdom)
- Hacettepe University, Department of Physics, Beytepe, 06532 Ankara (Turkey)
- Energy Technology Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
The pressure derivatives of the natural velocities and bulk modulus of YBa{sub 2}Cu{sub 3}O{sub 6.3}, YBa{sub 2}Cu{sub 3}O{sub 6.6}, and YBa{sub 2}Cu{sub 3}O{sub 6.94} tend to decrease with increasing oxygen content. Using the results obtained in this work and some data published previously, we have shown that the pressure derivative ({partial_derivative}{ital B}{sup {ital s}}/{partial_derivative}{ital P}){sub {ital P}=0} of the adiabatic bulk modulus of YBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}} is correlated strongly with sample porosity and decreases approximately linearly with decreasing {ital n}/{ital P}{sub {ital m}}, the ratio of porosity {ital n} to the maximum applied pressure {ital P}{sub {ital m}}. We have also shown that values of the mean acoustic mode Grueneisen parameter {gamma}{sup el} of ceramic superconducting compounds, determined by ultrasonic measurements, have a linear relationship with the porosity {ital n}. The effects of oxygen contents on the pressure derivative ({partial_derivative}{ital B}{sup {ital S}}/{partial_derivative}{ital P}){sub {ital P}=0} of YBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}} are also discussed.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 83944
- Journal Information:
- Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 5 Vol. 52; ISSN 0163-1829; ISSN PRBMDO
- Country of Publication:
- United States
- Language:
- English
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