Synthesis and electrical characterization of cobalt ferrite-barium titnate magnetoelectric composites
Kushal Singh, Manvendra Singh Khatri, Vishal Singh
Centre for Materials Science and Engineering, NIT Hamirpur, Hamirpur 177005, Himachal Pradesh, India
Composites of CoFe2O4 and BaTiO3 were prepared using aconventional ceramic double sintering process with varying compositions. The presence of both phases was confirmed by X-Ray diffraction. Variation of dielectric properties (dielectric constant and loss) with frequency range 1000 Hz to 5 MHz was studied. The ac conductivity was derived from dielectric constant ε′ and loss tangent (tan δ). The conduction phenomenon was explained on the basis of small polaron hopping model. The structural and morphological feature of these composites with varying compositions has been studied by scanning electron microscopy. The relationship between such properties, chemical composition and sintering temperatures are thoroughly discussed.
Keywords: X-ray diffraction, Dielectric properties, ac conductivity, CoFe2O4, BaTiO3
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