Pressure effect on magnetic properties of NdMn 2− xFe xGe 2 (0.1⩽ x⩽1.0) series of solid solutions

Abstract

Temperature and pressure dependence of magnetic properties in the NdMn 2− x Fe x Ge 2 series of solid solutions (0.1⩽ x⩽1.0) are reported. The ( P, T) magnetic phase diagrams are determined on the basis of the AC magnetic susceptibility measured in a weak magnetic field. The measurements were carried out under hydrostatic pressure up to 1.5 GPa in the temperature range 80−430 K. The reported data show that in the studied series of solid solutions, a drastic change in magnetic properties takes place in a narrow dilution parameter range (0.4⩽ x⩽0.5). While taking into account the magnetic properties, the studied range of Fe content could be divided into four regions. Only in the case of x=0.3 and 0.4, the external pressure significantly influences the magnetic properties of the samples.