ELECTRICAL-PROPERTIES OF BAKBIO3 CRYSTALS NEAR TC

Resistance-temperature and current-voltage characteristics in BaKBiO3 single crystals are examined near Tc. The Tc shift at various currents is compared with that reported for applied magnetic fields. The resis tance initial rise follows the Arrhenius plot with activation energies of the order of 10 meV. The comparison of the I-V characteristics wit h those obtained in cuprates compounds indicates tile influence of the dimensionality and supports the validity of bidimensional model for l ayered superconductors.