Comparison of History Effects in Magnetization in Weakly pinned Crystals of high-Tc and low-Tc Superconductors
Abstract
A comparison of the history effects in weakly pinned single crystals of a high Tc YBa2Cu3O7 - δ (for H c) and a low Tc Ca3Rh4Sn13, which show anomalous variations in critical current density Jc(H) are presented via tracings of the minor magnetization hysteresis loops using a vibrating sample magnetometer. The sample histories focussed are, (i) the field cooled (FC), (ii) the zero field cooled (ZFC) and (iii) an isothermal reversal of field from the normal state. An understanding of the results in terms of the modulation in the plastic deformation of the elastic vortex solid and supercooling across order-disorder transition is sought.
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