Research On Influence Exerted By Anisotropy Of Amorphous Wires On GMI Effect

First of all, this article introduces the content: knowledge related to the electromagnetic, development of giant magneto-impedance material and various factors that could have an impact on the giant magneto-impedance effect. In the discussion of the article, we use the giant magneto-resistive material is amorphous wire, because amorphous wire having a soft magnetic material characteristics of low magnetostriction coefficient, this feature was a essential factor by observing GMI effect. Another reason is when ambient and temperature change, amorphous wire has good stability. In this article the amorphous wire which have low magnetoriction is discussed when they have different magnetic anisotropy, the result is the changes of the impedance spectroscopy. The first model assumes that the easy magnetization axis parallel to the direction of the amorphous wire, and the easy magnetization direction of the second type models is circumferential direction. The amorphous wire having axis transverse magnetic permeability anisotropy is a function of the external magnetic field amplitude and other magnetic parameters of amorphous wire. GMI of the amorphous wire can explain the important role of the external magnetic field. On the other hand, the amplitude of GMI effect has a great relationship with the phenomenological damping parameter. Amorphous wire impedance has a classic representation of circumferential anisotropy. In the external magnetic field meet 00a≤H ≤H, its classic representation does not apply. In this field range, the amorphous wire impedance becomes permeability tensor,its transverse and longitudinal section can be experimentally measured. Longitudinal component of an amorphous wire impedance circumference of the opposite sex is a function of the external magnetic field and the anisotropy field, and the anisotropy axis of the longitudinal component of the amorphous wire impedance is the result when the external magnetic field values zero. The results showed that: a magnetostrictive amorphous wire having a good coefficient is more conducive to the GMI effect was observed, but whether the easy magnetization axis parallel to the direction or other anisotropy to the anisotropy is not a strict adherence to this effect.