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Vortex dynamics and second magnetization peak in PrFeAsO0.60F0.12 superconductor
We have studied the vortex dynamics in the PrFeAsO0.60F0.12 superconducting sample by dc magnetization and dynamic magnetization-relaxation rate (Q) measurements. The field dependence of the superconducting irreversible magnetization Ms reveals a second magnetization peak or fishtail effect. The large value of Q is an indication of moderate vortex motion and …