Magnetic Moment of Mn in Dilute Ferromagnetic Transition-Metal Alloys of FCC and HCP Phases

Abstract

Saturation magnetization of fcc Ni–Co and Co–Fe alloys containing Mn dilutely has been measured at 4.2 K in fields up to 40 kOe as a function of alloy composition. From interpolation of the results at compositions where fcc phase is metallurgically stable, the magnetic moment per Mn atom μ_Mn in fcc Co has been determined to be +1.7±0.05 μ_B. This result is different both in sign and in magnitude from previous results. Saturation magnetization of hcp Co containing Mn dilutely has also been measured in fields up to 100 kOe. The value of μ_Mn has been determined to be −7.5±0.5 μ_B.