Barium Titanate, X-ray diffraction, Dielectric Properties, Scanning Electron Microscopy
CoY0.5xLa0.5xFe2-XO4, Sol-gel auto combustion, Nanoparticle, Complex impedance, band-gap
CoFe2O4/Organoclay, Williamson-Hall method, Raman shift, Dielectric constant, Sol-gel autocombustion