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Electromagnetic properties of Ag 2 O doped and undoped BiPbSrCaCuO superconductor were evaluated to investigate the effect of pinning center on the magnetic shielding and suspension/levitation phenomena. The residual magnetization ΔM=M + -M - increased with dopant concentration, a maximum for 2% doping, wherein a fine uniform dispersion of Ag particles was observed. The magnetic...
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