Spin-glass freezing above the ordering temperature for the Kondo antiferromagnet CeNi2Sn2

Measurements of electrical resistivity, magnetic susceptibility and specifi c heat on an as-cast polycrystal sample CeNi2Sn2 are reported. From the fre quency and field dependence of the chi (ae) and chi (de) above TN, a spin g lass state with two freezing temperatures T-f1 = 3.9K and T-f2 = 4.4 K corr esponding to the tetragonal and monoclinic phases of CeNi2Sn2, separately, are proposed. Some comparable intriguing experimental facts are the behavio rs with anomalies observed in C(T), chi (ae)(T) and chi (de)(T) measurement s. A qualitative description for the anomalous physical properties of CeNi2 Sn2 compound is provided from the viewpoint of spin glass.