Heat capacity and magnetic phase diagram of the hydride CeRuSiH

The hydride CeRuSiH exhibits antiferromagnetic order with two transitions at TN1 = 7.5 and TN2 = 3.1 K. Furthermore, magnetization measurements M (H) up to H = 45 kOe shows a metamagnetic double transition at low temperatures, suggesting a complex magnetic phase diagram. Here, we present magnetization measurements and heat capacity data up to 90 kOe, which allows as to complete the magnetic phase diagram. In addition, from the analysis of the heat capacity, we propose a model for the crystal field splitting.