Low Temperature Susceptibility of the Noncentrosymmetric Superconductor CePt_3Si

Details Low Temperature Susceptibility of the Noncentrosymmetric Superconductor CePt_3Si Low Temperature Susceptibility of the Noncentrosymmetric Superconductor CePt_3Si

2004-06-25

arxiv.org/abs/cond-mat/0406645v1

Physics

Condensed Matter

Superconductivity

5 figures

Scientific paper

10.1103/PhysRevLett.94.107001

We report ac susceptibility measurements of polycrystalline CePt_3Si down to 60 mK and in applied fields up to 9 T. In zero field, a full Meissner state emerges at temperatures T/Tc < 0.3, where Tc=0.65 K is the onset transition temperature. Though transport measurements show a relatively high upper critical field Bc2 ~ 4-5 T, the low temperature susceptibility, \chi', is quite fragile to applied field, with \chi' diminishing rapidly in fields of a few kG. Interestingly, the field dependence of \chi' is well described by the power law, 4\pi\chi'=(B/B_c)^{1/2}, where Bc is the field at which the onset of resistance is observed in transport measurements.

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