Abstract
The correlation among microstructures, magnetic properties and domain patterns for the FINEMET nanocrystalline ribbons treated in a home-made continuous tension annealing equipment under different tensile stresses (σ) were investigated in detail. Results show that the effective permeability (μe) of the nanocrystalline ribbons can be expediently adjusted from 412.83 to 1659.96 by manipulating the magnitude of stress-induced anisotropy constant (Ku), wherein the Ku and σ are in a linear relationship. Owing to the increasing domain wall energy induced by the increase of σ for the nanostructured ribbons, the attenuation of μe with the elevating applied field and frequency can be effectively suppressed, the average domain width between the strip-like domain patterns gradually decreases, and the domination of magnetization process alters from domain-wall displacement to homogeneous rotation. These results will provide a referable idea for current transformers to meet the requirements of higher precision and lower energy consumption.
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