Heavy-fermion behavior in YbPtIn

The ytterbium compound YbPtIn has been studied by means of single-crystal x -ray diffraction, magnetic susceptibility, magnetization, heat capacity, el ectrical resistivity, and magnetoresistivity measurements, performed down t o 100 mK in fields up to 14 T. The magnetic properties of YbPtIn an governe d by the presence of the magnetic moments of Yb3+ ions, which order magneti cally at low temperatures. Strongly enhanced electronic specific heat, high ly reduced magnetic entropy, and characteristic Kondo-like behavior of the resistivity and the magnetoresistivity allow classifying YbPtIn as a heavy- fermion system.