DOI: https://doi.org/10.30970/jps.02.250
TEMPERATURE WAVES IN YBa2Cu3O7-δ
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Journal of Physical Studies 2(2), 250–254 (1998)
DOI: https://doi.org/10.30970/jps.02.250 TEMPERATURE WAVES IN YBa2Cu3O7-δ |
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K. Kalaydjiev, M. Baychev, Chr. Popov
Laboratory of Low Temperatures and Magnetism,
G. Nadjakov
Institute of Solid State Physics, Bulgarian Academy of Sciences
1784 Sofia, Bulgaria
We have studied the thermal properties of a dense sintered YBa$_2$Cu$_3$O$_{7-δ}$ ceramic in the temperature interval between liquid neon and room temperature. By means of the temperature wave method we have measured the thermal diffusivity $D$. The thermal conductivity $λ$ of the same material was directly measured using a steady state longitudinal method. The specific heat $C_p$ was calculated utilizing the data for $λ$, $D$ and the density $ρ$ of the samples. The results are discussed according to the theory of Debye and the total relaxation time $τ$.