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

Abstract

The magnetization processes in regular lattice Fe nano-systems are investigated by means of 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 basic magnetization phenomena. The Barkhausen effects are represented with magnetization steps in external field changes of ¦H, which are composed of jumps ¦M B and terraces ¦H B .

Temperature Dependence of the Magnetic Hysteresis Curves in Magnetic Multilayers

“…As shown in Figs , and c = 5 × 10 16 show very good agreement with the experimental data. Thus, differences in the shapes of these magnetic hysteresis curves are characterized by three parameters, i.e., temperature, T, interlayer coupling, J AB , and the step of the external magnetic eld, ΔH.…”

“…The steps of the external magnetic eld, ΔH, are related to the coercivity. As described in our previous paper 5) , the physical cause of the coercivity is related to the delay of the response of the Barkhausen jump [15][16][17][18][19] by the applied magnetic eld. From the temperature dependence of the step of the effective magnetic eld that was introduced by eq.…”