Magnetic fluctuations and superconductivity in YbPd2Sn
A. Amato, B. Roessli, P. Fischer, N. Bernhoeft, A. Stunault, C. Baines, A. Dönni, H. Sugawara
Abstract
We report muon spin relaxation and inelastic neutron measurements on the Heusler system YbPd2Sn. Localised anisotropic and quasi-elastic Yb magnetic fluctuations are observed below T = 150K. Both μSR 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 Γ7 CEF ground state. The muon depolarization rate exhibits an additional contribution upon decreasing the temperature below T c suggesting a close interplay between magnetic fluctuations and the superconducting state.
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