CHARACTERIZATION OF HG-BA-CA-CU-O-1223 SUPERCONDUCTOR

The HgBaCaCuO 1223 superconductors have been characterized in this wor k. XRD and SEM analyses indicate that HgBa2Ca2Cu3O8+delta is the major superconducting phase in the shape of a bar or plate in the samples. The transition temperature T(c) of one sample is 129 K by resistivity, AC and DC susceptibility measurements. Magnetic measurements includin g the magnetic critical current density and magnetization relaxations indicate that a strong thermally activated flux motion also exists in the Hg-based system of high-temperature superconductors.