Fe81Ga19磁致伸缩合金的动态磁导率研究

研究了Fe81Ga19磁致伸缩合金在不同的偏置磁场和频率下的动态磁导率。在低频或准静态下,该合金的磁导率能够达到160以上,但随频率增加,磁导率逐渐下降,频率大于6 KHz时,磁导率的下降减缓,并逐渐趋于稳定。当施加平行偏置磁场时,磁导率明显降低,而施加垂直偏置磁场时,与零偏置磁场相比,磁导率除较低频率段有少量的下降外,基本保持不变。

Dynamic Magnetic Permeability of Fe81Ga19 Magnetostrictive Alloy

The magnetic permeability of Fe81Ga19 magnetostrictive alloy under different bias magnetization fields and frequencies was studied.In low frequency or quasi-static state,the permeability of alloy can reach more than 160.The permeability decreases with the increase of frequency.When the frequency is larger than 6 kHz,the permeability changes slowly and keeps constant.When parallel bias fields are applied,permeability changes obviously.It should be emphasized that vertical bias field will basically not change the permeability except a little drop in the initial stage comparing with that under zero field.