“…These materials have a broad spectrum of practical applications. They are obtained using various approaches including RF-discharge plasma, chemical vapour deposition (CVD) [438], thermolysis of cobalt or iron carbonyls in the presence of surfactants [439][440][441]. The ferromagnetic behaviour of such optically transparent magnetic plastics corresponds to a multidomain magnetite structure; therefore, they could find use in magneto-optical technology (see, for example, Ref.…”