Thermal conductivity and thermoelectric power of DyBaCuO bulk superconductors

Hiroyuki Fujishiro, Shinya Nariki, Masato Murakami

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

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.

Original languageEnglish
JournalSuperconductor Science and Technology
Volume19
Issue number7
DOIs
Publication statusPublished - 2006 Jul

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Phonon scattering
hypoxia
Thermoelectric power
Superconducting materials
Thermal conductivity
thermal conductivity
Oxygen
Point defects
Rare earth elements
scattering
Transport properties
point defects
Superconducting transition temperature
rare earth elements
transport properties
transition temperature
Hot Temperature

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Thermal conductivity and thermoelectric power of DyBaCuO bulk superconductors. / Fujishiro, Hiroyuki; Nariki, Shinya; Murakami, Masato.

In: Superconductor Science and Technology, Vol. 19, No. 7, 07.2006.

Research output: Contribution to journalArticle

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