TY - JOUR
T1 - Thermal conductivity and thermoelectric power of DyBaCuO bulk superconductors
AU - Fujishiro, Hiroyuki
AU - Nariki, Shinya
AU - Murakami, Masato
N1 - Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2006/7
Y1 - 2006/7
N2 - The ab-plane thermal conductivity κ(T) and thermoelectric power S(T) have been investigated for DyBaCuO bulk superconductors for various contents of the Dy2BaCuO5 (Dy211) phase X. The absolute κ(T) value is pretty small compared with that of other REBaCuO bulks (RE ≤ Y and rare earth elements). The S(T) value above the superconducting transition temperature Tc changes from negative to positive and κ(T) slightly decreases with increasing oxygen deficiency in the DyBa 2Cu3O7-δ (Dy123) superconducting phase. The point-defect-type phonon scattering due to oxygen deficiency affects the κ(T) value, but is not a main origin for the low κ(T) even for the fully oxidized DyBaCuO bulk. Another type of powerful phonon scattering centre governs the thermal transport properties in the DyBaCuO bulk.
AB - The ab-plane thermal conductivity κ(T) and thermoelectric power S(T) have been investigated for DyBaCuO bulk superconductors for various contents of the Dy2BaCuO5 (Dy211) phase X. The absolute κ(T) value is pretty small compared with that of other REBaCuO bulks (RE ≤ Y and rare earth elements). The S(T) value above the superconducting transition temperature Tc changes from negative to positive and κ(T) slightly decreases with increasing oxygen deficiency in the DyBa 2Cu3O7-δ (Dy123) superconducting phase. The point-defect-type phonon scattering due to oxygen deficiency affects the κ(T) value, but is not a main origin for the low κ(T) even for the fully oxidized DyBaCuO bulk. Another type of powerful phonon scattering centre governs the thermal transport properties in the DyBaCuO bulk.
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U2 - 10.1088/0953-2048/19/7/S05
DO - 10.1088/0953-2048/19/7/S05
M3 - Article
AN - SCOPUS:33646810827
VL - 19
SP - S447-S450
JO - Superconductor Science and Technology
JF - Superconductor Science and Technology
SN - 0953-2048
IS - 7
ER -