Graphene Platelets-Based Magnetoactive Materials with Tunable Magnetoelectric and Magnetodielectric Properties

We fabricate hybrid magnetoactive materials (hMAMs) based on cotton fibers, silicone oil, carbonyl iron and graphene nanoplatelets (nGr) at various mass concentrations [Formula: see text]. The obtained materials are used as dielectric materials for manufacturing plane electrical capacitors. The equivalent electrical capacitance [Formula: see text] and resistance [Formula: see text] are measured in an electric field of medium frequency f, without and respectively with a magnetic field of magnetic flux density B in the range from 0.1 T up to 0.5 T. The results are used to extract the components [Formula: see text] and [Formula: see text] of the complex relative permittivity [Formula: see text] , and to reveal the magnitude of the induced magnetoelectric couplings [Formula: see text] and magnetodielectric effects [Formula: see text]. It is shown that [Formula: see text] , [Formula: see text] , [Formula: see text] and MDE are significantly influenced by [Formula: see text] and [Formula: see text]. We describe the underlying physical mechanisms in the framework of dipolar approximation and using elements of dielectric theory. The tunable magnetoelectric and magnetodielectric properties of hMAMs are useful for manufacturing electrical devices for electromagnetic shielding of living organisms.