Elastic properties of YBa2Cu3Ox, (Y1 − yPry)Ba2Cu3O7 and (BiPb)2Sr2Ca2Cu3O10 studied by ultrasound
| Autor: | G. Marbach, Helga Passing, S. Ewert, Christoph Hünnekes, Peter Lemmens, Albert Comberg, Philip Fröning |
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| Rok vydání: | 1990 |
| Předmět: |
Superconductivity
Bulk modulus Materials science Condensed matter physics Attenuation General Engineering Poisson's ratio Magnetic field symbols.namesake Nuclear magnetic resonance Condensed Matter::Superconductivity visual_art visual_art.visual_art_medium symbols Ceramic Crystallite Acoustic attenuation |
| Zdroj: | Journal of the Less Common Metals. :1129-1135 |
| ISSN: | 0022-5088 |
| DOI: | 10.1016/0022-5088(90)90527-q |
| Popis: | Sound velocity and attenuation measurements were performed on polycrystalline samples of the stoichiometry YBa2Cu3Ox and (Y1 − yPry)Ba2Cu3O7. The values of the bulk modulus and the Poisson ratio and their temperature dependences are affected by oxygen content and the praeseodymium substitution. For both systems a thermally activated relaxation process was found and analyzed. Effects of the sound velocity at the magnetic phase transition of PrBa2Cu3O7 at TN = 16K were observed. Measurements of the transverse sound attenuation and velocity in ceramic (BiPb)2Sr2Ca2Cu3O10 superconductors were performed with and without a magnetic field. The dynamic of thermally assisted flux flow and a depinning transition of the flux line lattice were studied. |
| Databáze: | OpenAIRE |
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