The　ceramic　0.75BiFeO(3)-BaFe1/2Nb1/2O3　(0.75BF-BaFN)　exhibits　enhanced　magnetisation　and　polar　order　regions　at　room　temperature.　This　study　investigated　the　microscopic　structure　and　the　magnetic,　ferroelectric,　magneto-ferroelectric,　and　optical　properties　of　0.75BF-BaFN　by　conducing　experiments　and　performing　density　functional　theory　(DFT)　calculations.　Evidence　of　weak　amplitude　R-type　octahedral　rotations　was　observed　using　transmission　electron　microscopy　(TEM).　X-ray　diffraction　(XRD)　refinement　revealed　that　the　P1　space　group　more　appropriately　described　the　structure　of　0.75BF-BaFN.　The　weak　influence　of　the　magnetic　field　H　on　the　polarisation　of　0.7BF-BaFN　and　0.75BF-BaFN　ceramics　was　investigated.　A　notable　magnetic　enhancement　was　observed　in　0.75BF-BaFN　ceramics　with　a　saturation　magnetisation　of　0.19　mu　B　per　Fe.　DFT　calculations　predicted　that　the　stable　magnetic　configuration　of　0.75BF-BaFN　is　a　G-type　antiferromagnetic　(AFM)　structure.　This　study　found　stronger　magnetic　interactions　between　first-neighbour　Fe　ions　(Ja　=　12　meV)　compared　to　pure　BiFeO3.　With　a　significant　remanent　moment,　strong　exchange　coupling,　and　magnetic　field　control　of　polarisation,　0.75BF-BaFN　may　facilitate　the　development　of　room　temperature　single-phase　magnetoelectric　components.