Thermal conductivity and thermal diffusivity of dense, bulk YBa2Cu4O8
1994 (English)In: High Temperatures - High Pressures volume 26, issue 1: Proceedings of the 13th European Conference on Thermophysical Properties (13 ECTP), Lisboa 1993, London: Pion Press , 1994, 53-57 p.Conference paper (Refereed)
We have measured the thermal conductivity, lambda, and the thermal diffusivity, a, of dense bulk ceramic YBa2Cu4O8 (1-2-4) between 30 and 300 K. For this material lambda is about 10 W/Km near 100 K, comparable with the in-plane thermal conductivity for single crystals of the more common high-Tc material YBa2Cu3O7 (1-2-3). Also, lambda has a much stronger T dependence in 1-2-4 than in 1-2-3. We find that, for 1-2-4, lambda can be very well described by a semiclassical phonon theory, which includes phonon, electron, and boundary scattering. The difference between the present results and those for 1-2-3 can be explained mainly in terms of a smaller amount of point-defect scattering in 1-2-4 because of the stable oxygen stoichiometry of this material.
Place, publisher, year, edition, pages
London: Pion Press , 1994. 53-57 p.
, High Temperatures - High Pressures, ISSN 0018-1544 ; Volume 26
Thermal conductivity, YBa2Cu4O8, high transition temperature superconductor, ceramic, HTS, HiTc
Condensed Matter Physics Condensed Matter Physics
Research subject Physics
IdentifiersURN: urn:nbn:se:umu:diva-26477OAI: oai:DiVA.org:umu-26477DiVA: diva2:271397
Editor: Carlos A. Nieto de Castro;
paper reprinted in Proceedings of the 13th European Conference on Thermophysical Properties, Editor Carlos A. Nieto, Pion Ltd., London 1995, ISBN 0 85086 164 0, pages 587 - 591.2009-10-122009-10-122010-02-01