Magnetic and Energy Dispersive X-Ray Characterization of Silver Substitution in Pb2Sr2Y0.5Ca0.5Cu3O8+z Superconductors (original) (raw)

Advances in Superconductivity IV, 1992

Abstract

The present investigation was performed with a purpose to study the effect of silver substitution and addition on the transition temperature, the Meissner fraction and the diamagnetic shielding of Pb2Sr2Y0.5Ca0.5Cu3O8+z superconductor. Samples were prepared by substitution (Cu depletion) and addition of silver to the title superconductor. X-ray diffraction measurements indicated that all the samples were single phase materials. Energy dispersive X-ray measurements were performed to determine exact amounts of the elements in the samples. From magnetic measurements, which were performed between 10 and 300 K using a SQUID magnetometer, it was found that both diamagnetic shielding and the Meissner fraction decreased by substitution and addition of silver to the superconductor. Superconducting transition temperature and the lattice parameters were not affected.

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