Magnetic and electrical properties of Ce(Cu0.5In1.5) compound

The as-cast polycrystal sample Ce(Cu0.5In1.5) exhibits bulk antiferromagnetic ordering below the temperature 2.1±0.1 K, as determined from the peak values of low-temperature static magnetic susceptibility and specific-heat data curves. The susceptibility of Ce(Cu0.5In1.5) follows Curie's behavior between 70 and 300 K with an effective paramagnetic moment 2.6±0.1 μB/Ce atom, a value close to that of free Ce+3 ion. At temperatures between 10 and 20 K, the heat capacity C(T) can be fitted to the expression C(T)=γT+βT3, which yields the value γ=54mJ/molK2 and β=0.86mJ/molK4, the latter value corresponding to the Debye temperature θD=190K. The entropy associated with the magnetic structure of Ce(Cu0.5In1.5) was found to meet the theoretical value of R ln2, which would be expected for a doublet ground state of Ce+3 ion in the compound Ce(Cu0.5In1.5).