Thermal conductivity of QMG-YBa2Cu3Ox in magnetic fields up to 14T

T. Sasaki, M. Sawamura, S. Awaji, K. Watanabe, N. Kobayashi, M. Matsukawa, K. Chiba, K. Noto, K. Kimura, K. Miyamoto, M. Hashimoto

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4 Citations (Scopus)


The a-b plane thermal conductivity κ for a QMG-YBa2Cu3Ox has been investigated in the temperature range 20K < T < 120K under magnetic fields up to 14 T applied parallel to the c-axis. In zero field, κ strikingly increases below Tc and takes a maximum near Tc/2. The magnitude of this increase is about 45% of the value at Tc. Above Tc, κ exhibits slow decrease with increasing temperature, which suggests the importance of the phonon-phonon scattering. By applying magnetic fields, κ is remarkably reduced. The temperature dependence of κ can be explained in terms of the relaxation time approximation including Umklapp processes. The degradation of κ due to a magnetic field is discussed as a function of a scaling parameter to BCS energy gap.

Original languageEnglish
Pages (from-to)2135-2136
Number of pages2
JournalPhysica B: Physics of Condensed Matter
Issue numberPART 2
Publication statusPublished - 1994 Feb 2

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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