Bhoi, D and Mandal, P and Choudhury, Pranab (2013) Vortex dynamics and second magnetization peak in PrFeAsO0.60F0.12 superconductor. Journal of Applied Physics, 113 (18). Article No-183902. ISSN 0021-8979

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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 M-s reveals a second magnetization peak or fishtail effect. The large value of Q is an indication of moderate vortex motion and relatively weak pinning energy. Data analysis based on the generalized inversion scheme suggests that the vortex dynamics can be described by the collective pinning model. The temperature dependence of the critical current is consistent with the pinning due to the spatial variation in the mean free path near a lattice defect (delta l-pinning). The temperature and field dependence of Q indicate a crossover from elastic to plastic vortex creep with increasing temperature and magnetic field. Finally, we have constructed the vortex phase diagram based on the present data. (C) 2013 AIP Publishing LLC.

Item Type: Article
Subjects: Electronics
Depositing User: Bidhan Chaudhuri
Date Deposited: 04 Sep 2013 11:23
Last Modified: 04 Sep 2013 11:23

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