  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.
