Pressure influence on magnetic properties of Nd2RhIn8

Abstract We have studied the pressure effect on the magnetic phase diagram of tetragonal Nd 2 RhIn 8 . The magnetization under uniaxial pressure up to 5.3 kbar applied along the tetragonal c -axis and the heat capacity under hydrostatic pressure were measured in magnetic fields up to 7 and 14 T, respectively. Both types of measurements reveal an increase of T N with increasing pressure; the effect is considerably stronger for the uniaxial pressure. Considering also the anisotropic compressibility in this family of compounds, we conclude that T N increases with decreasing c / a . The phase boundary between the ground-state AF1 phase and the field-induced AF2 phase shifts slightly to higher magnetic fields with increasing pressure. The ground state phase is thus stabilized by applying pressure. The magnetic phase diagram is constructed.