Magnetic phase transitions in (Fe1−xRux)2P (0.25 ≤ x ≤ 0.6)

Abstract Low-field ac magnetic susceptibility measurements as a function of temperature have been carried out on the orthorhombic solid solution (Fe 1− x Ru x ) 2 P with 0.25 ≤ x ≤ 0.6. They indicate the onset of two transitions. One of them corresponds to the Curie temperature ( T c ). The other one, characterized by a broad maximum, occurs at a temperature T k somewhat lower than T c . This behaviour is similar to that exhibited by ferromagnetic Fe 2 P under pressure. Both T c and T k exhibit a net and continuous decrease with increasing Ru content.