Magneto-optical properties of nanocomposites ferromagnetic-carbon

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 - (Co40Fe40B20)(X)(SiO2)(100-X)(1), (Co401Fe40B20)(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 [(Co40Fe40B20)(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. (C) 2017 Published by Elsevier B.V.