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Thermal conductivit...
Thermal conductivity and thermal diffusivity of dense, bulk YBa2Cu4O8
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- Andersson, Britt M. (author)
- Umeå universitet,Institutionen för fysik
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- Sundqvist, Bertil (author)
- Umeå universitet,Institutionen för fysik
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(creator_code:org_t)
- London : Pion Press, 1994
- 1994
- English.
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In: High Temperatures - High Pressures volume 26, issue 1. - London : Pion Press. ; , s. 53-57
- Related links:
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https://urn.kb.se/re...
Abstract
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- 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.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Keyword
- Thermal conductivity
- YBa2Cu4O8
- high transition temperature superconductor
- ceramic
- HTS
- HiTc
- Condensed matter physics
- Kondenserade materiens fysik
- Superconductivity
- Supraledning
- fysik
- Physics
Publication and Content Type
- ref (subject category)
- kon (subject category)
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