Abstract:Conventional magnetic annealing (MA) of the permanent magnet alloy alnico involves application of an external magnetic field at temperatures within the spinodal decomposition range. This field biases the growth of the Fe-Co rich, ferromagnetic α1-phase in an energetically favorable 〈001〉 direction in alignment with the applied field within an Al-Ni rich, paramagnetic α2-phase. Utilizing a magnetic field to bias the α1-phase may limit alnico from reaching theoretical coercivity due to (1) the field having maxim… Show more
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