Abstract
We report the critical current density (JC) and pinning force (FP) of the superconducting skutterudite PrPt4Ge12 estimated through magnetization measurements. The JC decreases exponentially with magnetic field, with different rates at low and high magnetic fields. FP shows a peak at the reduced field 0.1B/BC2. The value of this reduced field is much less than that observed in most of the superconductors. It is found that the usual scaling law of pinning force FP/FP,max = (B/BC2)α(1−B/BC2)β is not applicable in PrPt4Ge12. The critical current density and pinning force are explained within the framework of the double exponential model which was used to explain the properties of the two gap superconductor MgB2.
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