Shuvnikov-de haas oscillation in YNi2B2C

Abstract

The electrical resistivity and the magnetoresistance have been studied in single crystalline boro-carbide superconductor YNi2B2C at temperatures down to 80 mK and in magnetic fields up to 19 T. The electrical resistivity at low temperatures exhibits the quadratic behavior in temperature with a modestT2 coefficient ofA=1.6×10−9Ω cm/K2. In magnetic fields aboveHc2, a positive magnetoresistance with a linear field dependence, Δ ρ/ρ=aH, wherea=0.0289 μ Ω cm/T, was found. In this region, with fields applied parallel to the c-axis, the Shuvnikov-de Haas oscillation, whose periodicity is 517 T was observed for the first time in this compound. This result is consistent with the α-branch observed by the de-Haas van Alphen effect [1].