Observation Of Antiferromagnetic Coupling In Ferromagnetic Metallic [Ni/Gd](10) And Oxide [LSMO/LCMO](10) Multilayers

Magnetic properties of multilayers of both metallic and oxide ferromagnetic materials are investigated. In metallic, it is the multilayer of nickel (Ni) and gadolinium (Gd) metals ([Ni/Gd](10)) and in oxide, it is multilayer of ferromagnetic perovskite La2/3Sr1/3MnO3 (LSMO) and La2/3Ca1/3MnO3 (LCMO) as [LSMO/LCMO](10) materials. Multilayer films are prepared using dc sputtering and pulsed laser deposition. In both the cases a clear signature of antiferromagnetic coupling between the layers was observed. In addition, they display non-monotonic temperature dependence in coercivity.