Magnetic fluctuations and superconductivity in YbPd$_2$Sn

Details Magnetic fluctuations and superconductivity in YbPd$_2$Sn Magnetic fluctuations and superconductivity in YbPd$_2$Sn

2002-05-29

arxiv.org/abs/cond-mat/0205617v2

Physics

Condensed Matter

Strongly Correlated Electrons

Author list updated, acknowledgements added

Scientific paper

10.1016/S0921-4526(02)01631-9

We report muon spin relaxation and inelastic neutron measurements on the Heusler system YbPd$_2$Sn. Localised anisotropic and quasi-elastic Yb magnetic fluctuations are observed below $T = 150$K. Both $\mu$SR and neutron data indicate a slowing-down of the spin-fluctuations, upon lowering the temperature, similar to that observed in Kondo lattices. The temperature dependence of the quasi-elastic neutron signal is compatible with a crystal-electric field scheme having a $\Gamma_7^{\rm CEF}$ ground state. The muon depolarization rate exhibits an additional contribution upon decreasing the temperature below $T_{\rm c}$ suggesting a close interplay between magnetic fluctuations and the superconducting state.

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