Comparison of thermomagnetic history effects in weakly pinned single crystals of R3Rh4Sn13 (R=Yb, Ca)
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A comparative study of the thermomagnetic memory effects of Jc in two weakly pinned low Tc superconductors, Ca3Rh4Sn13 (CaRhSn) and Yb3Rh4Sn13 (YbRhSn), is presented. In both the systems, the peak effect (PE) phenomenon appears as an order-disorder transformation through stepwise amorphization of the flux line lattice (FLL). However, in CaRhSn. we can witness another disorder-driven transition (Bragg glass (BG) to a vortex glass (VG) in a distinct manner as in a single crystal of high Tc YBa2Cu3O7-δ for H‖c.
KeywordsWeakly pinned R3Rh4Sn13 thermomagnetic history effects peak effect amorphization of flux line lattice order-disorder transition
PACS Nos74.25.Dw 74.60.Ge
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