Pressure effects on the antiferromagnetic order of the hydride CeRuSiH

Abstract

The non-magnetic heavy fermion CeRuSi upon hydrogen absorption develops an antiferromagnetic behaviour, mainly due to the pronounced expansion of the unit cell. The effects of pressure on the x(T) and M(H) curves of the hydride CeRuSiH up to 10.3 kbar are presented. Both, the Néel temperatures and the critical fields of the metamagnetic transitions, increase with pressure, whereas the net magnetization decreases. This evolution could be understood within the framework of the Doniach diagram.