Executive Summary : | Magnetic skyrmions are vortex-like objects with a swirling spin configuration, which can be used in racetrack-based magnetic data storage. They are typically stabilized in chiral magnets with bulk Dzyaloshinskii-Moriya interaction (DMI) and multilayer thin films with interfacial DMI. However, most skyrmion hosting bulk materials are found below room temperature, limiting their use in potential devices. This proposal aims to design novel non-trivial topological magnetic skyrmions at room temperature in centrosymmetric magnets. Centrosymmetric magnets cannot host DMI due to the Moriya rule, so the question arises whether they can host magnetic skyrmions. The lack of DMI in these magnets leads to the formation of skyrmions/bubbles with both helicities, making them less stable. To integrate these skyrmions with local inversion center breaking, the proposal proposes introducing heavy elements into the lattice, creating targeted disorder through foreign ion bombardment, and deposited skyrmion hosting centrosymmetric thin films on substrates that provide strain. These designing mechanisms aim to introduce local/global symmetry breaking to the skyrmion hosting centrosymmetric materials, introducing a small DMI in the system. This induced DMI can lock the helicity of the skyrmions. The project will explore non-trivial magnetic ground states by combining bulk skyrmion hosting centrosymmetric materials with heavy metals with different spin orbit coupling strengths. The nanometric form of these materials will be used to introduce defects through ion beam irradiation. |