Abstract
We have studied the pressure effect on the magnetic phase diagram of tetragonal Nd2RhIn8. The magnetization under uniaxial pressure up to 5.3kbar applied along the tetragonal c-axis and the heat capacity under hydrostatic pressure were measured in magnetic fields up to 7 and 14T, respectively. Both types of measurements reveal an increase of TN 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 TN 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.
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