Spintronic Logic Devices Based on Skyrmioniums and Magnetic Defects

Abstract

This study uses micromagnetic simulations to investigate how skyrmioniums can function as information carriers in logic devices. By deliberately placing magnetic defects within a device and adjusting the applied current using the spin–orbit torque effect, we can control the trajectory of skyrmioniums. This control allows us to either displace or trap the skyrmioniums at specific locations due to the attractive or repulsive interactions between the magnetic defects and the skyrmioniums. The geometry used is a reconfigurable logic gate that enables various universal logic operations. We also demonstrate that it is possible to create more complex systems, such as Half Adders and Full Adders, by utilizing magnetic defects with a specific Dzyaloshinskii–Moriya interaction constant.