Numerical Analysis of Magnetic Domain Energy System in Nano-scale Fe

TL;DR

This paper numerically analyzes magnetic domain energy systems in nano-scale iron, revealing how domain structures change with external magnetic fields and produce Barkhausen noise, using simulations of Fe lattice systems.

Contribution

It introduces a numerical simulation approach to study magnetic domain behaviors and Barkhausen effects in nano-scale Fe systems, providing direct evidence of these phenomena.

Findings

Magnetic domain structures change with external field variations.

Barkhausen noise arises from flux structure changes.

Simulation results show terraces and jumps in magnetization curves.

Abstract

Magnetic materials generally construct magnetic domains in external field H. These domain structures are changed with the field changes {\Delta}H accompanying the Barkhausen effects. These phenomena are shown using Fe domain energy systems composed of classical magnetic dipole moment interactions. The magnetization curves are created with terraces and jumps, where the flux structure changes produce the Barkhausen noise. The terraces indicate the delays of the magnetization processes for the field H. These numerical simulations are performed in Fe nano-scale regular lattice systems of rods and belts, which directly show the evidences of these basic phenomena.