Magnetic phase diagram of face-centered cubic disordered Ni1-x(Fe(Mn))x alloys

The magnetic phase diagram of a quasibinary section of Fe0.7Ni0.3-cMnc alloys is studied in detail by the neutron diffraction technique, by magnetic measurements and Moessbauer spectroscopy. It is shown that on the combined phase diagram of the γ-Ni1-x(Fe(Mn))x alloys there are two tricritical points separating the regions of homogeneous ferromagnetism amd antiferromagnetism from that of inhomogeneous (frustrated) magnetism; in the region of the critical concentration of existence of long-range order, a spin glass state involving short-range magnetic correlation is realized