Simultaneous measurements of thermal diffusivity, thermal conductivity andthermopower with application to copper and ceramic superconductors

A home made experimental set-up allows us to measure the thermal conductivi ty, the thermopower and the thermal diffusivity simultaneously in the tempe rature range (20-300 K). Therefore the specific heat can be deduced. The ro le of a radiation shield is shown to be relevant. Tests of the system are m ade on a 99.9% pure Cu sample and two polycrystalline cuprate ceramics for illustration. Without any complicated optimisation, the technique indicates much promise already due to its efficiency and rapidity.