Superconducting fluctuation in Bi2Sr2Ca2Cu3Ox

Abstract Measurements of the resistivity, of the DC Meissner effect, of the isothermal magnetisation, of the specific heat, of the thermal expansion and of the Hall effect are reported for a high quality polycrystalline sample of the 2223 phase of the BiSrCaCuO family of high temperature superconductors. They are discussed in terms of critical fluctuations within ± 10 K about T c due to a very small coherence volume. Distinct features appear in the data at the Ginzburg-Landau transition temperature ( T GL ≈107 K ) and at the Kosterlitz-Thouless like temperature (T ∗ KT ≈106 K) .