Effect of magnetic field annealing on soft magnetic properties for (Fe_(0.5)Co_(0.5))_(73.5)Cu_1Nb_3Si_(13.5)B_9 alloy

摘要

The effect of magnetic field annealing on crystallization and high-frequency/ temperature soft magnetic properties is investigated for (Fe_(0.5)Co_(0.5))_(73.5)-Cu_1Nb_3Si_(13.5)B_9 alloy. The applied magnetic field in the annealing process effectively facilitates the precipitation of ferromagnetic α-FeCo(Si) grains from the amorphous precursor and softens the magnetic properties, which are verified by the increase of crystalline volume fractions (V_(cry)) and the decrease of coercivity (H_C), respectively. The initial permeability (μ_i) of sample annealed with applied field exhibits relatively higher value at elevated temperature, which is attributed to the intensive magnetic exchange coupling between the α-FeCo(Si) grains through the intergranular phase.