Thermal conductivity properties of glass-ceramic (Bi2-delta-gamma Ga delta Tl gamma)Sr2Ca2Cu3O10+x high-T-c superconductors


BALCI Y. , YAKINCI M., Aksan M. A. , OZDES A. , ATES H.

JOURNAL OF LOW TEMPERATURE PHYSICS, cilt.117, ss.963-967, 1999 (SCI İndekslerine Giren Dergi) identifier

  • Cilt numarası: 117
  • Basım Tarihi: 1999
  • Doi Numarası: 10.1023/a:1022523512664
  • Dergi Adı: JOURNAL OF LOW TEMPERATURE PHYSICS
  • Sayfa Sayıları: ss.963-967

Özet

Glass-ceramic BSCCO superconductors with nominal (Bi2-delta-gammaGadeltaTlgamma)Sr2Ca2Cu3O10+x compositions, where delta=0.20, 0.40, 0.60 and gamma=0.10, 0.30, 0.40, have been prepared by the melt quenching method. The thermal conductivity, kappa(T) measurements were performed between 30K and 285K and results obtained found to be between 3.1 and 9.9 mW/cm.K depending an the substitution levels and temperature. Results obtained showed that the phonon-defect scattering dominates above the T-c for all samples but below the T-c a strong coupling mechanism occurs. The best electrical performance was obtained to be 113K and 107K for T-c and T-zero, respectively.