Magnetic Properties and Magnetic Phase Diagram of bcc Cr–Fe–Mn Alloys

Magnetization measurements have been performed on bcc Cr80-xFe20Mnx (3.6 less than or equal to x less than or equal to 38.4) and Cr75-xFe25Mnx (5.0 less than or equal to x less than or equal to 29.1) alloys between 6 and 300 K using a SQUID magnetometer. The ferromagnetic and spin-glass transitions are observed in these alloys. The magnetic phase diagram of bcc Cr80-xFe20Mnx and Cr75-xFe25Mnx alloys are determined using the Curie temperature, T-C and spin-glass temperature, T-g decided in this work, and the Neel temperatures, T-N reported on the same alloy system. The spin-glass phase spreads for a wide concentration region in the present Cr-Fe-Mn ternary alloy system. The magnetic moment of the ferromagnetic Cr-Fe-Mn alloys at T = 0 is compared with Slater-Pauling curve.