Comparative study of the magnetic properties of positive and nearly zero magnetostrictive submicron amorphous wires

摘要

Rapidly solidified submicron amorphous wires with positive and nearly zero magnetostriction are studied in order to understand the effect that a significant reduction in the diameter of the metallic nucleus has on their magnetic behavior and anisotropy distribution. Submicron wires with metallic nucleus diameters between 350 and 800 nm were investigated with hysteresis loop measurements, the magneto-optical Kerr effect, and ferromagnetic resonance studies. The analysis of the results shows the dominant role of shape anisotropy in nearly zero magnetostrictive submicron wires, as well as in positive magnetostrictive ones with nucleus diameters smaller than 350 nm. Magnetoelastic anisotropy is still important in positive magnetostrictive submicron wires with metallic nucleus diameters larger than 500 nm.