Defects and the thermal conductivity of YBa2Cu3O7-d and YBa2Cu4O8
1993 (English)In: Journal of Alloys and Compounds, volume 195: Proceedings of Symposium A on High Tc Superconductors of the 1992 E-MRS Fall Conference, Strasbourg 1992, Elsevier Sequoia S.A. , 1993, 655-658 p.Conference paper (Refereed)
We present below the first measured data for the thermal diffusivity and the thermal conductivity, λ, of dense, sintered ceramic YBa2Cu4O8 (1-2-4) as a function of temperature T between 40 and 310 K. At 300 K, λ is 6.3 Wm−1K−1, increasing with decreasing T to about 9.5 Wm−1K−1 near Tc. This T dependence is much stronger than in YBa2Cu3O7−δ (1-2-3). Only a very small enhancement is observed in λ below Tc. As in 1-2-3, λ is mainly limited by phonon scattering by defects.
Place, publisher, year, edition, pages
Elsevier Sequoia S.A. , 1993. 655-658 p.
, Journal of Alloys and Compounds, ISSN 0925-8388 ; Vol. 195
Superconductivity, thermal conductivity, high-Tc superconductors, YBa2Cu3O7, YBa2Cu4O8, defect scattering, phonon transport
Condensed Matter Physics Condensed Matter Physics
Research subject Physics
IdentifiersURN: urn:nbn:se:umu:diva-26555DOI: 10.1016/0925-8388(93)90823-6ISBN: 0 444 81529 5OAI: oai:DiVA.org:umu-26555DiVA: diva2:272245
Editors: J. Dumas, H.W. Neumüller, H.F. Braun, V.P. Seminozhenko, and Yu.D. Tretyakov.
The journal paper (ISSN above) has also been reprinted in a conference book as European Materials Research Society Symposium Proceedings volume 38: Proceedings of Symposium A on High Tc Superconductors of the 1992 E-MRS Fall Conference, Strasbourg (ISBN given above), with the same pagination.2009-10-142009-10-142010-02-01