Effect of Pressure on the Curie Temperatures of the System (Fe_1−xNi_x)₂P

Abstract

The Curie temperatures of the system (Fe_1−xNi_x)₂P have been measured as a function of pressure up to 5 kbar. The pressure effect on the Curie temperature ∂T_c⁄∂p is −3.46×10⁻³ deg. bar⁻¹ for Fe₂P, and its value increases sharply with increasing x and becomes zero at about x=0.3. The pressure effect on the exchange interactions in Fe₂P is discussed briefly according to the concentration dependence of ∂T_c⁄∂p in the system (Fe_1−xNi_x)₂P.