Effect of glass removal on the magnetic behavior of FeSiB glass-covered wires

Abstract

Amorphous magnetic glass-covered wires are of interest for basic research and potential applications. Their specific magnetic behavior originates in their very small diameters and in the high internal stresses induced during preparation. Removal of the glass cover leads to significant changes in their magnetic properties and behavior, thus improving their suitability for sensing applications. A thorough study of the changes produced by the glass removal implies the consideration of the changes produced in the internal stress distribution. We propose a method for the calculation of the residual internal stress distribution in wires obtained after the glass removal, based on the results of the magnetic measurements. The residual internal stress distribution allows us to explain the magnetic behavior of these wires. We also present the advantages of wires obtained after the glass removal from the practical point of view in comparison with those of conventional amorphous wires.