The magnetic properties of FeSiAl soft magnetic composites based on mechanically crushed powder are investigated under transverse magnetic field. Experimental results indicate that the permeability decreases about 8% when a transverse magnetic field is applied in the core, but the magnetic losses reduce more than 20%. Magnetic loss separation under low magnetic field shows that the loss reduction of the core under transverse magnetic field is mainly due to the reduction of hysteresis loss, and the hysteresis loss reduces about 45%. Magnetic loss separation under high magnetic field also gives similar results, and the hysteresis loss reduces about 31%. The reduction of hysteresis loss and permeability is attributed to the enlargement of domain size under transverse magnetic field. The enlargement of domain size leads to a decrease in the amount of domain walls participating in the wall displacement and makes the spin rotation more difficult; both these two effects result in reduction of hysteresis loss and permeability.

在横向磁场下研究了基于机械粉碎粉末的FeSiAl软磁复合材料的磁性能。实验结果表明，当在芯中施加横向磁场时，磁导率降低了约8％，但磁损耗降低了20％以上。低磁场下的磁损耗分离表明，横向磁场下铁心的损耗减小主要归因于磁滞损耗的减小，磁滞损耗减小了约45％。高磁场下的磁损耗分离也给出了相似的结果，磁滞损耗降低了约31％。磁滞损耗和磁导率的减小归因于横向磁场下磁畴尺寸的增大。畴尺寸的增大导致参与壁位移的畴壁数量的减少，并使自旋旋转更加困难。这两个作用都可以减少磁滞损耗和磁导率。