Computer Simulations on Barkhausen effects and Magnetizations in Fe Nano-Structure Systems

The magnetization processes in Fe nano-systems are investigated using the numerical simulations based on classical magnetic dipole moment interactions. The domain energies are calculated from moment-moment interactions over whole systems using large scale computing resources. The results directly show most of basic magnetization phenomena. The Barkhausen effects are represented with jumps and terraces of magnetization steps induced from external field changes of {\Delta}H.