研究了旋转磁场退火对非晶态合金Fe_4Co_(66)Ni_2T工_2Si_(10)B_(16),Fe_5Co_(70)Si_(15)B_(10)及Fe_(40)Ni_(40)B_(20)的磁各向异性的影响。用磁转矩方法测定了在不同旋转速率的磁场作用下合金中感生磁各向异性在等温退火(260—280℃)过程中的变化。实验结果指出,在旋转磁场退火过程中,原存于试样中的感生磁各向异性K_u值随退火时间单调下降,其下降曲线和磁场的旋转速率无关;而由旋转磁场退火所感生的磁各向异性,在一般实际条件下,可以忽略不计.这个实验结果可以成功地用本文提出的理论进行解释.
The effect of rotating magnetic field annealing (RMA) on the anisotropy has been studied using a disk specimen of amorphous alloy Fe_4Co_(66)Ni_2Ta_2Si_(10)B_(16), Fe_5Co_(70)Si_(15)B_(10) and Fe_(40)Ni_(40)B_(20). The induced variation of anisotropy of the alloys on the process of isothermal annealing at 260—280℃ was measured in a rotating magnetic field with different speeds. During RMA, the value of K_u already induced in the specimen decreases monotonically with annealing time and its decreasing rate is independent of the rotation speed of field applied. The anisotropy induced by RMA in common practical conditions is very small and can be neglected. The experimental results may be explained by a simple theory proposed by the authors.
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