Study of metallic nanostructures using mandelstam-brillouin spectroscopy

In this work, using Mandelstam-Brillouin spectroscopy, the evolution of the antisymmetric Dzyaloshinski-Moriya exchange interaction in thin-film Pt/Co nanostructures with an intermediate amorphous Pt1-xCox alloy was evaluated and studied. The maximum value of VDM -0.6 mJ/m2 was obtained for a three-layer structure with Pt1-xCox alloys of different compositions. It was found that by varying the thickness, composition of the layers, and type of interfaces of the thin-film nanostructure, it is possible to effectively model the Dzyaloshinski-Moriya interaction energy. Thus, controlling the quality and types of interfaces allows effective management of spin-orbital coupled effects in such structures. In addition, it is shown that the value of the Dzyaloshinski-Moriya interaction for a three-layer nanostructure is weakly dependent on temperature, which is consistent with the behaviour of the magnetisation of Co.