Effect of Ag2O on magnetic properties of BiSrCaCuO oxides

Effects of Ag2O doping on the electromagnetic properties in the BiSrCaCuO oxides was investigated. The electromagnetic properties of Ag2O doped and undoped BiSrCaCuO superconductor were evaluated to investigate the contribution of the pinning centers to the magnetic effect. It was confirmed experimentally that a large amount of magnetic flux was trapped in the Ag2O doped sample than that in the undoped one, indicating that the pinning centers of magnetic flux are related closely to the occurrence of the magnetic effect. During the sintering, doped Ag2O was converted to Ag particles which were finely dispersed in superconductor samples. It is considered that the area where normal conduction takes place increases by adding Ag2O and the magnetic flux penetrating through the sample increases. The results suggested that Ag2O acts to increase pinning centers of magnetic flux, contributing to the occurrence of the electromagnetic properties.