Simultaneous measurements of thermal diffusivity, thermal conductivity and thermopower with application to copper and ceramic superconductors |
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| Authors: | H. Bougrine J.F. Geys S. Dorbolo R. Cloots J. Mucha I. Nedkov M. Ausloos |
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| Affiliation: | (1) S.U.P.R.A.S., Montefiore Electricity Institute, B28, University of Liège, 4000 Liège, Belgium, BE;(2) S.U.P.R.A.S., Physics Institute, B5, University of Liège, 4000 Liège, Belgium, BE;(3) S.U.P.R.A.S., Chemistry Institute, B6, University of Liège 4000 Liège, Belgium, BE;(4) Institute for Structural and Low Temperature Research, Polish Academy of Sciences, 50950 Wroclaw, Poland, PL;(5) Institute of Electronics, Bulgarian Academy of Sciences, 72, Tsarigradsko Chaussee, 1784 Sofia, Bulgaria, BG |
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| Abstract: | A home made experimental set-up allows us to measure the thermal conductivity, the thermopower and the thermal diffusivity simultaneously in the temperature range (20-300 K). Therefore the specific heat can be deduced. The role of a radiation shield is shown to be relevant. Tests of the system are made 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. Received 9 November 1998 and Received in final form 12 July 1999 |
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| Keywords: | PACS. 06.30.-k Measurements common to several branches of physics and astronomy - 72.15.Jf Thermoelectric and thermomagnetic effects |
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