Interfacial Dzyaloshinskii-Moriya interaction at an epitaxially grown ferromagnetic and heavy metal interface*

We study Dzyaloshinskii-Moriya interaction(DMI) in a series of epitaxially grown CoFe/Pt films using momentum-resolved Brillouin light scattering. The symmetry breaking present in the bilayer allows interfacial DMI, which is expected to depend on atomic alignment at the interface. Different CoFe alloys are studied. Co(25)Fe(75) is of particular interest because it exhibits exceptionally low magnetic damping [ref]. By controlling the chemical composition, thickness and growth conditions, one can tune the DMI parameter along with other magnetic properties of the film. We can measure these different properties using a single technique, Brillouin Light Scattering, allowing for a full characterization of the tunable parameters which could allow for engineering materials with the desired combination of properties.