The effect of ageing on YBa2Cu3O7-x obtained by the photoacoustic method
| Autor: | D. Lukovic, S. S. Vujatovic, Katarina Radulović, D. Radovic-Vasiljevic, M Pantelija Nikolic, S. Djuric |
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| Přispěvatelé: | Ristić, Momčilo M. |
| Jazyk: | angličtina |
| Rok vydání: | 2003 |
| Předmět: |
Materials science
Diffusion Analytical chemistry Pellets 02 engineering and technology Thermal diffusivity lcsh:Chemical technology photoacoustic method 01 natural sciences superconductor Phase (matter) Condensed Matter::Superconductivity 0103 physical sciences Materials Chemistry lcsh:TP1-1185 YBa2Cu3O7-x 010302 applied physics Superconductivity Metals and Alloys Carrier lifetime 021001 nanoscience & nanotechnology Condensed Matter Physics Amplitude ageing Ceramics and Composites 0210 nano-technology Frequency modulation |
| Zdroj: | Science of Sintering Science of Sintering, Vol 35, Iss 1, Pp 23-29 (2003) |
| Popis: | Thermal diffusivity and electric transport properties of fourteen years old superconducting YBa2Cu3O7-x pellets were obtained using the photoacoustic transmission technique and then compared with freshly made superconducting samples. The theoretical model for photoacoustic (PA) detection configuration is given. The measured amplitude and phase PA signals, as a function of the modulation frequency, were numerically analyzed. The thermal diffusivity, the coefficient of the carrier diffusion, optical absorption coefficient and the excess carrier lifetime were calculated. The thermal diffusivity of freshly produced samples decreased, after ageing, from about 1.3?10-6 to about 6.1?10-7 m2/s. |
| Databáze: | OpenAIRE |
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