Possible magnetic field-induced quantum critical phase transition in YbPtIn

We are presenting detailed anisotropic resistivity and heat capacity measurements for temperatures down to $\sim~0.4$ K, and magnetic fields up to 140 kOe, on solution-grown YbPtIn single crystals. For fields applied within the basal plane, the magnetic ordering temperature ($\sim~2.1$ K for H $=~0$) is driven below our base temperature around 40 kOe, whereas for higher magnetic fields non-Fermi-liquid behavior is possible; a slower decrease of the ordering temperature with the applied field is observed for H $\parallel~c$. By analogy with the previously reported YbAgGe compound, we anticipate a field-induced quantum phase transition in YbPtIn.