Anomalous behavior of the weak itinerant ferromagnet ${\mathrm{Sc}}_3$In under hydrostatic pressure

The magnetic properties of three homogeneous samples of the weak itinerant ferromagnet ${\mathrm{Sc}}_3$In have been determined in the hydrostatic pressure, temperature, and magnetic field ranges 0–6 kbar, 3–300 K, and 0–57 kOe, respectively. The pressure dependence of the Curie temperature $T_c$(P) was determined to 31 kbar. The application of hydrostatic pressure is found to significantly enhance the magnetic properties of ${\mathrm{Sc}}_3$In at both low and high temperatures relative to $T_c$. These results contradict a theoretical model by Wohlfarth, according to which the magnetic properties of homogeneous weak itinerant ferromagnets should be weakened under pressure.