Abstract
The paper presents the results of a study of the radial distribution of the magnetic permeability of an Co66Fe4Ta2.5Si12.5B15 amorphous wire with a radius of 55 μm. The study was performed using magneto-impedance tomography in the frequency range of alternating current from 0.01 to 100 MHz. It was found that the magnetic permeability significantly depends on the radial coordinate. Wherein the inner regions of the wire have predominantly axial anisotropy, while the outer layer about 2.5 µm thick has circular anisotropy. It is shown that the magnetoelastic mechanism is not the main one in the formation of magnetic anisotropy in the surface layer of the wire.
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