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

Abstract The as-cast polycrystal sample Ce(Cu 0.5 In 1.5 ) 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(Cu 0.5 In 1.5 ) follows Curie's behavior between 70 and 300 K with an effective paramagnetic moment 2.6±0.1 μ B /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 ) = γ T + β T 3 , which yields the value γ = 54 mJ / mol K 2 and β = 0.86 mJ / mol K 4 , the latter value corresponding to the Debye temperature θ D = 190 K . The entropy associated with the magnetic structure of Ce(Cu 0.5 In 1.5 ) 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(Cu 0.5 In 1.5 ).