A comparative study on magnetocaloric effect in NdR_{u 2}S_{i 2}and NdR_{u 2}G_{e 2}

Temperature dependent magnetization, M-H isotherm and MCE properties of NdR u 2 G e 2 and NdR u 2 S i 2 have been studied to make a comparison between these two compounds. Both of these take two magnetic transitions, one at T N and another at T t. T t of both is same, i.e. 10 K but T N of NdR u 2 G e 2 is 19 K while that of NdR u 2 S i 2 is 23.5 K. They both show interesting M-H isotherms. The values of entropy change (ΔS M) for NdR u 2 G e 2 and NdR u 2 S i 2 are 3.2 J kg-1 K-1 and 4 J kg-1 K-1, at a field of 50 kOe wide temperature range. The value of ΔS M of NdR u 2 G e 2 is smaller than that of NdR u 2 S i 2 as the field dependent magnetization isotherm does not lead to saturation at 50 kOe in NdR u 2 G e 2 but it is approaching to saturation in case of NdR u 2 S i 2.