Thermal conductivity of Er-Ba-Cu-O and Ho-Ba-Cu-O superconducting bulks

Tomoyuki Naito; Hiroyuki Fujishiro; Kazumasa Iida; Shinya Nariki; Masato Murakami

doi:10.1088/0953-2048/21/8/085001

Thermal conductivity of Er-Ba-Cu-O and Ho-Ba-Cu-O superconducting bulks

Tomoyuki Naito, Hiroyuki Fujishiro, Kazumasa Iida, Shinya Nariki, Masato Murakami

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

1 Citation (Scopus)

Abstract

We have measured the temperature dependence of the in-plane thermal conductivity, κ_ab(T), for both Er-Ba-Cu-O and Ho-Ba-Cu-O superconducting bulks. The absolute values of κ_ab(T) for both bulks are smaller than that of Y-Ba-Cu-O bulk, but are larger than that of Dy-Ba-Cu-O bulk, which is known to show an anomalous small κ_ab. κ_ab(T) for Ho-Ba-Cu-O shows a positive slope (dκ_ab/dT>0) in the normal state, similarly to that for Dy-Ba-Cu-O. On the other hand, a slightly negative slope (dκ_ab/ dT<0) is found for Er-Ba-Cu-O. The out-of-plane thermal conductivity, κ_c, was also measured for Er-Ba-Cu-O bulk, and the anisotropy in the thermal conductivity, (κ_ab/κ_c), was estimated to be about 2.

Original language	English
Article number	085001
Journal	Superconductor Science and Technology
Volume	21
Issue number	8
DOIs	https://doi.org/10.1088/0953-2048/21/8/085001
Publication status	Published - 2008 Aug 1

ASJC Scopus subject areas

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

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title = "Thermal conductivity of Er-Ba-Cu-O and Ho-Ba-Cu-O superconducting bulks",

abstract = "We have measured the temperature dependence of the in-plane thermal conductivity, κab(T), for both Er-Ba-Cu-O and Ho-Ba-Cu-O superconducting bulks. The absolute values of κab(T) for both bulks are smaller than that of Y-Ba-Cu-O bulk, but are larger than that of Dy-Ba-Cu-O bulk, which is known to show an anomalous small κab. κab(T) for Ho-Ba-Cu-O shows a positive slope (dκab/dT>0) in the normal state, similarly to that for Dy-Ba-Cu-O. On the other hand, a slightly negative slope (dκab/ dT<0) is found for Er-Ba-Cu-O. The out-of-plane thermal conductivity, κc, was also measured for Er-Ba-Cu-O bulk, and the anisotropy in the thermal conductivity, (κab/κc), was estimated to be about 2.",

author = "Tomoyuki Naito and Hiroyuki Fujishiro and Kazumasa Iida and Shinya Nariki and Masato Murakami",

year = "2008",

month = aug,

day = "1",

doi = "10.1088/0953-2048/21/8/085001",

language = "English",

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journal = "Superconductor Science and Technology",

issn = "0953-2048",

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T1 - Thermal conductivity of Er-Ba-Cu-O and Ho-Ba-Cu-O superconducting bulks

AU - Naito, Tomoyuki

AU - Fujishiro, Hiroyuki

AU - Iida, Kazumasa

AU - Nariki, Shinya

AU - Murakami, Masato

PY - 2008/8/1

Y1 - 2008/8/1

N2 - We have measured the temperature dependence of the in-plane thermal conductivity, κab(T), for both Er-Ba-Cu-O and Ho-Ba-Cu-O superconducting bulks. The absolute values of κab(T) for both bulks are smaller than that of Y-Ba-Cu-O bulk, but are larger than that of Dy-Ba-Cu-O bulk, which is known to show an anomalous small κab. κab(T) for Ho-Ba-Cu-O shows a positive slope (dκab/dT>0) in the normal state, similarly to that for Dy-Ba-Cu-O. On the other hand, a slightly negative slope (dκab/ dT<0) is found for Er-Ba-Cu-O. The out-of-plane thermal conductivity, κc, was also measured for Er-Ba-Cu-O bulk, and the anisotropy in the thermal conductivity, (κab/κc), was estimated to be about 2.

AB - We have measured the temperature dependence of the in-plane thermal conductivity, κab(T), for both Er-Ba-Cu-O and Ho-Ba-Cu-O superconducting bulks. The absolute values of κab(T) for both bulks are smaller than that of Y-Ba-Cu-O bulk, but are larger than that of Dy-Ba-Cu-O bulk, which is known to show an anomalous small κab. κab(T) for Ho-Ba-Cu-O shows a positive slope (dκab/dT>0) in the normal state, similarly to that for Dy-Ba-Cu-O. On the other hand, a slightly negative slope (dκab/ dT<0) is found for Er-Ba-Cu-O. The out-of-plane thermal conductivity, κc, was also measured for Er-Ba-Cu-O bulk, and the anisotropy in the thermal conductivity, (κab/κc), was estimated to be about 2.

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