Micromagnetic Simulation of Skyrmion Deformation in Elliptical Nanoring

The present study explores the micromagnetic properties of ultrathin elliptical nanorings with whirling magnetic structures called skyrmions. The simulations investigate the creation and dynamics of skyrmion using the Object Oriented MicroMagnetic Framework (OOMMF). A cobalt nanoring placed on a platinum substrate makes up the model system. To closely resemble genuine materials, material properties including saturation magnetization, Dzyaloshinskii-Moriya interaction (DMI) constant, and Heisenberg exchange stiffness are carefully selected. The simulations methodically examine the effects of applied magnetic fields and different DMI strengths. In order to comprehend their influence on the stability and deformation of the skyrmions inside the nanoring, these external elements are investigated. Our results show a strong relationship between the generated skyrmion size and shape and the DMI strength. Distinct stability and deformation patterns result from varying DMI intensities, underscoring the pivotal function of this interaction in controlling skyrmion behavior inside the nanoring geometry. At higher DMI values, skyrmions exhibit irregular patterns and increased magnetic torque, with variations in domain wall thickness and skyrmion configuration over time. We demonstrate that by optimizing the combination of DMI strength and magnetic field, controlled generation and stabilization of skyrmions in nanostructures can be achieved. This work widens the opportunities for future developments in spintronic technology by aiding in the creation of nanoscale memory and information devices.