The magnetization of PrFeAsO$_{0.60}$F$_{0.12} sueprconductor

TL;DR

This study investigates the magnetization properties of PrFeAsO$_{0.60}$F$_{0.12}$ superconductor, revealing details about its magnetic components, critical current density, and vortex phase diagram through experimental measurements.

Contribution

It provides the first detailed analysis of the magnetization behavior, critical current density, and vortex phase diagram of PrFeAsO$_{0.60}$F$_{0.12}$ superconductor.

Findings

Large intragrain critical current density observed.

Second peak in $J_L(H)$ curve shifts with temperature.

Vortex phase diagram constructed from magnetization and resistivity data.

Abstract

The magnetization of the PrFeAsO$_{0.60}$F$_{0.12}$ polycrystalline sample has been measured as functions of temperature and magnetic field $(H)$. The observed total magnetization is the sum of a superconducting irreversible magnetization ($M_s$) and a paramagnetic magnetization ($M_p$). Analysis of dc susceptibility $\chi(T)$ in the normal state shows that the paramagnetic component of magnetization comes from the Pr$^{+3}$ magnetic moments. The intragrain critical current density $(J_L)$ derived from the magnetization measurement is large. The $J_L(H)$ curve displays a second peak which shifts towards the high-field region with decreasing temperature. In the low-field region, a plateau up to a field $H^*$ followed by a power law $H^{-5/8}$ behavior of $J_L(H)$ is the characteristic of the strong pinning. A vortex phase diagram for the present superconductor has been obtained from the magnetization and resistivity data.