Abstract
We have synthesized ferromagnetic τ-phase Mn 54 Al 46 /α-phase Fe 65 Co 35 composite by annealing a mixture of paramagnetic e-phase Mn 54 Al 46 and ferromagnetic α-phase Fe 65 Co 35 particles at 650℃. The volume fraction ( f h ) of hard τ-phase Mn 54 Al 46 of the composite was varied from 0 to 1. During the annealing, magnetic phase transformation occurred from paramagnetic e-phase to ferromagnetic τ-phase Mn 54 Al 46 . The magnetization and coercivity of the composite monotonically decreased and increased, respectively, as the f h increased. These results are in good agreement with our proposed composition dependent coercivity and modified magnetization equations.
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