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Influence of etching of the surface on the magnetic properties of amorphous and nanocrystalline Fe73.5Cu1Nb3Si15.5B7 ribbon

Here we present the results for the influence of etching of the surfaces of the amorphous Fe 73.5 Cu 1 Nb 3 Si 15.5 B 7 ribbon on its magnetic properties in amorphous state and states obtained by successive annealing for one hour at several temperatures T a ≤ 450°C. We discuss the changes in the domain structure, anisotropy and domain wall (DW) pinning in terms of the corresponding changes in the average angle between the domain magnetizations and ribbon axis, coercive field H c , remanent magnetization M r and maximum permeability μ max . The measurements show rather weak effects of etching on the magnetization processes and DW pinning in the amorphous state (small initial decrease of H c ). Results for the successively annealed sample show that etching does not improve properties of the nanocrystallized FeCuNbSiB ribbons.