Green synthesis of reduced graphene oxide/Sr2CuMgFe28O46 nanocomposite with tunable magnetic properties

Sr2CuMgFe28O46 nanoparticles, a novel X-type hexagonal ferrite, were synthesized by a Green sol-gel method. The reduced graphene oxide (RGO)/Sr2CuMgFe28O46 nanocomposite was fabricated without any reduction agent. The Sr2CuMgFe28O46 nanoparticles and RGO/Sr2CuMgFe28O46 nanocomposite were characterized by XRD, EDS, FE-SEM, SEM, PSA and VSM. Sr2CuMgFe28O46 nanoparticles were spherical shaped with hexagonal ferrite structure and grain size of 7-27 nm, approximately. The magnetic measurements revealed that their hard ferrite character at room temperature and the saturation magnetization (Ms) and coercivity (Hc) of Sr2CuMgFe28O46 nanoparticles were 43.3 emu g−1 and 3787 Oe, respectively. As expected, the magnetic response of the (RGO)/Sr2CuMgFe28O46 nanocomposite was lower than for Sr2CuMgFe28O46 nanoparticles.