Reversible and Non-Reversible Transformation of Magnetic Structure in Amorphous Microwires

Abstract

We provide an overview of the tools directed to reversible and irreversible transformations of the magnetic structure of glass-covered microwires. The irreversible tools are the selection of the chemical composition, geometric ratio, and the stress-annealing. For reversible tuning we use the combination of magnetic fields and mechanical stresses. The studies were focused on the giant magnetoimpedance effect and the velocity of the domain walls propagation important for the technological applications. The essential increase of the giant magnetoimpedance effect and the control of the domain wall velocity were achieved as a result of the use of two types of control tools. The performed simulations reflect the real transformation of the helical domain structures experimentally found.

Keywords

• soft magnetic materials
• amorphous magnetic wires
• magnetic domains
• magneto-optic Kerr effect
• giant magnetoimpedance effect
• magnetic anisotropy