Thermal conductivity and thermoelectric power of DyBaCuO bulk superconductors

Hiroyuki Fujishiro; Shinya Nariki; Masato Murakami

doi:10.1088/0953-2048/19/7/S05

Thermal conductivity and thermoelectric power of DyBaCuO bulk superconductors

Hiroyuki Fujishiro, Shinya Nariki, Masato Murakami

Research output: Contribution to journal › Article › peer-review

13 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 T_c changes from negative to positive and κ(T) slightly decreases with increasing oxygen deficiency in the DyBa ₂Cu₃O_7-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 language	English
Pages (from-to)	S447-S450
Journal	Superconductor Science and Technology
Volume	19
Issue number	7
DOIs	https://doi.org/10.1088/0953-2048/19/7/S05
Publication status	Published - 2006 Jul
Externally published	Yes

ASJC Scopus subject areas

Ceramics and Composites
Condensed Matter Physics
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

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10.1088/0953-2048/19/7/S05

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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.",

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AU - Nariki, Shinya

AU - Murakami, Masato

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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.

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Thermal conductivity and thermoelectric power of DyBaCuO bulk superconductors

Abstract

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