INFLUENCE OF ETCHING OF THE SURFACE ON THE MAGNETIC-PROPERTIES OF AMORPHOUS AND NANOCRYSTALLINE FE7.35CU1NB3SI15.5B7 RIBBON

Here we present the results for the influence of etching of the surfac es of the amorphous Fe73.5Cu1Nb3Si15.5B7 ribbon on its magnetic proper ties in amorphous state and states obtained by successive annealing fo r one hour at several temperatures T-a less than or equal to 450 degre es C. We discuss the changes in the domain structure, anisotropy and d omain wall (DW) pinning in terms of the corresponding changes in the a verage angle <delta> between the domain magnetizations and ribbon axis , coercive field H-c, remanent magnetization M-r and maximum permeabil ity mu(max). The measurements show rather weak effects of etching on t he magnetization processes and DW pinning in the amorphous state (smal l initial decrease of H-c). Results for the successively annealed samp le show that etching does not improve properties of the nanocrystalliz ed FeCuNbSiB ribbons.