Interfacial magnetic interactions in 2D systems Interfacial magnetic interactions, such as exchange coupling, Dzyaloshinskii-Moriya interaction (DMI) and interfacial perpendicular magnetic anisotropy (PMA), radically change the behaviour of thin-film magnets, of which spin textures are often a manifestation. In metallic thin films, chiral spin textures stabilised by DMI and PMA (e.g. spin spirpar Alexandra Mougin - Thèses hors de l'EDPIF