SYNTHESIS AND CHARACTERIZATION OF BI2SR2PRCU2O8-CRYSTALS(DELTA SINGLE)

Solid state crystal growing method has been used for oxides to synthes is stoichiometric Bi2Sr2PrCu2O8+delta compounds. Stable layered struct ure phase is found to crystallize iu fully oxygenated atmosphere at th e temperature or 1000 degrees C. Powder X-ray diffraction analysis ind icates a pseudo-tetragonal phase with lattice parameters a approximate to b=5.43 Angstrom and c=30.3 Angstrom. Four-probe transport measurem ents shows superconductivity with the onset temperature at similar to 15 K. Near the temperature, dc magnetic susceptibility examination exh ibits diamagnetic signal in zero-field-cool. The volume fraction of Me issner signal in field cool is as large as similar to 20% for the lowe st experimental temperature of 2 K indicating bulk nature. Under die a pplication of an external magnetic field, die anisotropy of the compou nd is estimated to be similar to 10(3) from resistivity measurements.