Physics Of Vortex State

Pramana

, Volume 58, Issue 5, pp 979-983

Comparison of thermomagnetic history effects in weakly pinned single crystals of R 3Rh4Sn13 (R=Yb, Ca)

  • S SarkarAffiliated withTata Institute of Fundamental Research
  • , S RamakrishnanAffiliated withTata Institute of Fundamental Research
  • , AK GroverAffiliated withTata Institute of Fundamental Research
  • , CV TomyAffiliated withDepartment of Physics, Indian Institute of Technology
  • , G BalakrishnanAffiliated withDepartment of Physics, University of Warwick
  • , D McK PaulAffiliated withDepartment of Physics, University of Warwick

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Abstract

A comparative study of the thermomagnetic memory effects of J c in two weakly pinned low T c 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 T c YBa2Cu3O7-δ for Hc.

Keywords

Weakly pinned R3Rh4Sn13 thermomagnetic history effects peak effect amorphization of flux line lattice order-disorder transition

PACS Nos

74.25.Dw 74.60.Ge