Lateral Size Dependence of Pac-man shaped Ni80Fe20 Element on Magnetization Reversal

Abstract

The magnetization configuration and switching mechanism of small patterned submicron and micron scaled magnetic elements of Ni80Fe20 thin film having the elongated Pac-man (EPM) shape is performed using micromagnetic simulation. The reduction of lateral size of elongated Pac-man elements decreases the possibility of domain wall formation, which results in increasing the switching speed. However, the magnetization ringing is enhanced for smaller elements due to the high energy supplied to the element to achieve the reversal. The ringing is found to be suppressed from the reduction in the thickness of the thin film to 3.2 nm as seen from other micromagnetic studies performed on elliptical Ni80Fe20 elements.