Magneto-optical properties of nanocomposites ferromagnetic-carbon

Abstract Current work is devoted to the study of magneto-optical properties of ferromagnetic metal-carbon nanocomposites that belong to a new class of composites in which partial mixing and the formation of metastable phases between components are allowed. Films of nanocomposites were obtained using ion-beam sputtering of composite target on ceramic substrates. There were three systems synthesized with wide range of magnetic phase concentrations – (Co 40 Fe 40 B 20 ) X (SiO 2 ) 100−X (1), (Co 401 Fe 40 B 20 ) X (C) 100−X (2)and (Co) X (C) 100−X (3). It is found that the evolution of the TKE spectra for the [(Co) x (C) 100−x ] system with a change in the concentration of FM granules indicates a transition from amorphous CoC granules to crystalline Co granules in a carbon matrix. The shape TKE spectra for the system2 was weakly dependent on the concentrations x. The difference in the behavior of the magneto-optical properties of the [(Co) x (C) 100−x ] and [(Co 40 Fe 40 B 20 ) x (C) 100−x ] system is explained on the basis of the composite formation model, taking into account the possibility of chemical reactions of carbon with metals and boron.