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Thermal conductivity and thermal diffusivity of dense, bulk YBa2Cu4O8
Umeå University, Faculty of Science and Technology, Physics.
Umeå University, Faculty of Science and Technology, Physics.
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, Published paper (Refereed)
Abstract [en]

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.
Series
High Temperatures - High Pressures, ISSN 0018-1544 ; Volume 26
Keyword [en]
Thermal conductivity, YBa2Cu4O8, high transition temperature superconductor, ceramic, HTS, HiTc
National Category
Condensed Matter Physics Condensed Matter Physics
Research subject
Physics
Identifiers
URN: urn:nbn:se:umu:diva-26477OAI: oai:DiVA.org:umu-26477DiVA: diva2:271397
Note
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.Available from: 2009-10-12 Created: 2009-10-12 Last updated: 2010-02-01

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Andersson, Britt M.Sundqvist, Bertil

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