DEFECTS AND THE THERMAL-CONDUCTIVITY OF YBA2CU3O7-DELTA AND YBA2CU4O8

Authors
ANDERSSON BM SUNDQVIST B
Citation
Bm. Andersson et B. Sundqvist, DEFECTS AND THE THERMAL-CONDUCTIVITY OF YBA2CU3O7-DELTA AND YBA2CU4O8, Journal of alloys and compounds, 195(1-2), 1993, pp. 655-658
Citations number
15
Categorie Soggetti
Chemistry Physical","Metallurgy & Mining","Material Science
Journal title
Journal of alloys and compounds → ACNP
ISSN journal
09258388
Volume
195
Issue
1-2
Year of publication
1993
Pages
655 - 658
Database
ISI
SICI code
0925-8388(1993)195:1-2<655:DATTOY>2.0.ZU;2-J
Abstract
We present below the first measured data for the thermal diffusivity a nd the thermal conductivity, lambda, of dense, sintered ceramic YBa2Cu 4O8 (1-2-4) as a function of temperature T between 40 and 300 K. At 30 0 K, lambda is 6.3 Wm-1 K-1, increasing with decreasing T to about 9.5 Wm-1 K-1 near T(C). This T dependence is much stronger than in YBa2Cu 3O7-delta (I -2-3). Only a very small enhancement is observed in lambd a below T(C). As in 1-2-3, lambda is mainly limited by phonon scatteri ng by defects.