EFFECT OF A PULSED MAGNETIC-FIELD ON THE TRANSVERSE RESISTANCE OF A LAYERED SUPERCONDUCTOR

The field dependences of the transverse resistance of a single crystal of the layered superconductor Bi2Sr2CaCu2Oy (BSCCO-2212) with T-c0 ap proximate to 92 K are studied in magnetic fields up to 50 T in the per pendicular orientation H perpendicular to ( ab). It is established tha t in the resistive region the resistance is a power-law function of th e field, and the temperature dependence of the barrier height for flux creep is obtained. It is found that in a wide temperature range, 50-1 25 K, the transverse magnetoresistance of the crystal in the normal st ate and under conditions of superconductivity suppression by a strong magnetic field is negative and can be approximated by a linear law wit h a temperature-dependent slope. (C) 1998 American Institute of Physic s. [S0021-3640(98)01317-6].