Abstract

The thermal conductivity K(T) of the superconducting 90-KYBCO, 60-KYBCO, BSCCO (2212) and non-superconducting Pr 2CuO 4, PrBa 2Cu 3O 7−x, Bi 2Sr 2YCu 2O 8 single crystals have been measured. All investigated superconducting crystals demonstrate an upturn in K(T) at the superconducting critical temperature T c. The thermal conductivity of the non-superconducting oxides varies strongly from a common dielectric-like behavior (Pr 2CuO 4) to a glassy-like temperature dependence (BSYCO).

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