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We have studied metastability effects pertaining to the peak effect (PE) incritical current density ($J_c$) via isofield scans in ac susceptibilitymeasurements in a weakly pinned single crystal of Yb$_3$Rh$_4$Sn$_{13}$($T_c(0) \approx 7.6 $~K). The order-disorder transition in this specimenproceeds in a multi-step manner. The phase coexistence regime between the onsettemperature of the PE and the spinodal temperature (where metastability effectscease) seems to comprise two parts, where ordered and disordered regionsdominate the bulk behavior, respectively. The PE line in the vortex phasediagram is argued to terminate at the low field end at a critical point in theelastic (Bragg) glass phase.Comment: To appear in Current trends in Vortex State Studies (Pramana-J.  Phys.

pramāna

Pulverization of the flux line lattice, the phase coexistence and the spinodal temperature of the order—disorder transition in a weakly pinned crystal of Yb3Rh4Sn13