Transformation of the $Gd_xCe_{1-x}MnSi$ magnetic phase diagram induced by hydrostatic pressure

Experimental data have been used to build and analyze magnetic phase diagrams of $Gd_xCe_{1-x}MnSi$. Pressures of about 8-10 kbar have been found to induce antiferromagnetic ordering within the Mn sublattice for all the compounds studied. The results obtained are discussed on the assumption that the exchange interaction inside the ferromagnetically ordered layers prevails over the interlayer exchange interaction.