Magnetization Measurements and Pressure Dependence of the Curie Point of the Phase ${\mathrm{Sc}}_3$In

The approximate composition limits of the ${\mathrm{Sc}}_3$In phase have been determined as 22 to 23 at.% In. Susceptibility measurements have been made on a number of alloys, containing various amounts of the ${\mathrm{Sc}}_3$In phase, in the composition range 21-26 at.% In. Heat and mechanical treatments reveal a critical dependence of the magnetic properties on the degree of order of the ${\mathrm{Sc}}_3$In phase. Although the susceptibility varies inversely with temperature, this behavior is not considered to be evidence for the presence of localized moments, since the magnetic moment per Sc atom is much smaller than that associated with $S=\frac{1}{2}$, and does not agree with the value obtained from the magnetization data as a function of magnetic field. Initial susceptibility measurements, below the Curie temperature, exhibit structure which suggests that a strong magnetocrystalline anistropy may exist at temperatures close to $T_c$. The pressure dependence of the Curie point has been determined as $\frac{\partial T_c}{\partial P}={1.9}_5\times {10}^{-4\mathrm{}}$ °K ${\mathrm{bar}}^{-1\mathrm{}}$.