Optimization of Giant Magnetoimpedance Effect in Fe-rich Microwires

摘要

We observed remarkable optimization of the magnetic softness in Fe-rich magnetic microwires by stress-annealing. It is found that the as-prepared Fe-rich microwires present rectangular hysteresis loops. The magnetic softness and magnetoimpedance effect of the Fe-rich microwires can be considerably improved by annealing. Observed stress-induced anisotropy and related changes of magnetic properties are discussed considering internal stresses relaxation and "back-stresses".