Abstract
We present magnetocaloric properties of the CeSi1.3Ga0.7 alloy, a representative of the CeSi2−xGax series. Crystallographic studies revealed that the alloy crystallizes in the tetragonal I41/amdα-ThSi2-type structure. Analysis of magnetic susceptibility denoted the magnetic phase transition at TC=10.5 K. Based on the Arrott plot and the analysis of the critical exponents, it was determined that the phase transition is of the second-order type. From magnetization and specific heat results, we calculated following magnetocaloric parameters for a magnetic field change of 5 T: the magnetic entropy change -ΔSM=5.7 J kg−1 K−1, the adiabatic temperature change ΔTad=3.4 K, the relative cooling power value RCP=32.8 J kg−1, and the temperature averaged entropy change TEC(3)=5.3 J kg−1 K−1 and TEC(10)=3.4 J kg−1 K−1. Comparison of the master curves obtained from ΔSM based on the magnetization and specific heat analysis indicates that both methods of obtaining the magnetocaloric parameters give very similar results for this alloy.
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