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

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.