Publikationsrepositorium - Helmholtz-Zentrum Dresden-Rossendorf

We report on the pressure-tuning of the magnetic properties of the Heusler alloy Mn₂PtGa. At ambient pressure, Mn₂PtGa orders ferrimagnetically below T_C ≈ 222 K, followed by a first-order ferrimagnetic to antiferromagnetic transition around T_FI-AF ≈ 102 K upon cooling. Magnetization measurements up to 1.2 GPa evidence a stabilization of the ferrimagnetic phase, i.e., T_C increases while T_FI-AF decreases upon application of pressure. The magnetic properties in the ferromagnetic phase are not altered upon increasing pressure. However, the fraction of the ferrimagnetic phase present in the inhomogeneous antiferromagnetic low-temperature phase increases with pressure.