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Magnetization and Intrinsic Coercivity for τ-phase Mn54Al46/α-phase Fe65Co35 Composite
Journal of Magnetics, Volume 19, Number 1, 31 Mar 2014, Pages 55-58
Abstract
We have synthesized ferromagnetic τ-phase Mn54Al46/α-phase Fe65Co35 composite by annealing a mixture of paramagnetic ε-phase Mn54Al46 and ferromagnetic α-phase Fe65Co35 particles at 650 oC. The volume fraction ( fh) of hard τ-phase Mn54Al46 of the composite was varied from 0 to 1. During the annealing, magnetic phase transformation occurred from paramagnetic ε-phase to ferromagnetic τ-phase Mn54Al46. The magnetization and coercivity of the composite monotonically decreased and increased, respectively, as the fh increased. These results are in good agreement with our proposed composition dependent coercivity and modified magnetization equations.
Keywords: permanent magnet; magnetic composites; exchange coupling; Mn-Al; Fe-Co
DOI: http://dx.doi.org/10.4283/JMAG.2014.19.1.055
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