Preparation and characterization of glass covered magnetic wires

The amorphous glass covered magnetic wires (AGCW) are of great interest due to their specific magnetic properties that can be controlled through the composition as well as through the metallic core diameter and the thickness of the glass cover. The specific magnetic properties are determined by the magnitude of the magnetic anisotropies induced by the mechanical stresses due to the preparation process. This paper presents a series of conditions that are determinant for the preparation process of the AGCW. The basic magnetic characteristics of the highly positive, negative and nearly zero magnetostrictive AGCW are presented as a function of composition and samples state. ly performed FMR measurements showed that the metal–glass interface influences the magnetic characteristics including the magnetic anisotropy. The magnetic domain structure of the highly positive AGCW presents a single domain axially magnetized with some closure domains at the ends of the wire while for the wires obtained after the glass removal it presents an axially magnetized inner core with a typical maze domain configuration at the surface of the wire.