Thermal conductivity of YBaCuO bulk superconductors under applied field: effect of content and size of Y211 phase

The temperature and magnetic field dependence of the a-axis thermal conductivity κ a of YBaCuO bulk superconductors has been measured as a function of the content and the size of Y 2BaCuO 5 (Y211) impurity phase particles. In the specimen with the high critical current density J c the κ a ( T) enhan...

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Bibliographic Details
Published inPhysica. C, Superconductivity Vol. 392; pp. 171 - 174
Main Authors Fujishiro, Hiroyuki, Teshima, Hidekazu, Ikebe, Manabu, Noto, Koshichi
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.10.2003
Subjects
Critical current
Magnetic field
Thermal conductivity
YBaCuO
Thermal conductivity
51.20.+d
Critical current
YBaCuO
Magnetic field
74.72.−h
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Summary:The temperature and magnetic field dependence of the a-axis thermal conductivity κ a of YBaCuO bulk superconductors has been measured as a function of the content and the size of Y 2BaCuO 5 (Y211) impurity phase particles. In the specimen with the high critical current density J c the κ a ( T) enhancement below the superconducting transition temperature T c is drastically suppressed in comparison with that of the lower J c specimens with smaller Y211 content or with larger Y211 particle size. In the YBaCuO bulk system, Y211 particles are efficient phonon scatterers as well as the main flux pinning centers and a clear correlation between the flux pinning and the phonon scattering strength has been confirmed.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0921-4534
1873-2143
DOI:10.1016/S0921-4534(03)01104-3