2017/02/28 by Sarmita Majumder, Priyamvada Jadaun, Majumder, Sarmita +5
Engineering · Physics and Astronomy · #FOS: Physical sciences #Magnetic properties of thin films #Materials Science (cond-mat.mtrl-sci) #Metallic Glasses and Amorphous Alloys #Theoretical and Computational Physics
paper · pdf · doi:10.48550/arxiv.1703.01172
openalex publication_date 2017/02/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
A new paradigm is required to facilitate the demand for the huge data storage capacity and faster data processing in the future. Nano structures such as magnetic skyrmions have been predicted to address this issues as these vortex structures are the smallest particle-like magnetic features and are topologically protected from crystallographic defects or magnetic disorder. We report here stable skyrmions at room temperature and with zero applied field in ebeam evaporated Ir Fe Ir MgO thin film stacks. Micromagnetic simulations show that these skyrmions are induced by interfacial Dzyaloshinskii Moriya interactions between the ferromagnetic and heavy metal ultra thin layers values in the range between 3.1 to 3.6. We also show the field dependencies of the skyrmion width and density. The room temperature zero field width is 110 nm, approximately comparable to the value showed by Fert et al and Boulle et al for the multi stacks thin film. DFT calculations corroborate our experimental results by predicting a DMI value of 3.67.