Structural, magnetic and magnetoelectric properties of the magnetoelectric composite material

(x) CoFe2O4 + (1 − x) Ba0.9Sr0.1TiO3 magnetoelectric (ME) composites with x = 0.1, 0.2, 0.3, 0.4 and 0.5 were prepared by a conventional standard double sintering ceramic method. The magnetic and ME properties of composites consisting of cobalt ferrite (CoFe2O4) and barium strontium titanate (Ba0.9Sr0.1TiO3) were investigated. The X-ray diffraction analysis was carried out to confirm the phases formed during sintering and also to calculate the lattice parameters. The hysteresis measurements were done to determine saturation magnetization (Ms), remanence magnetization (Mr) and coercivity (Hc) of the samples. The ME voltage coefficient (dE/dH)H was studied as a function of intensity of the magnetic field. The measured ME response demonstrated strong dependence on the volume fraction of CoFe2O4 and the applied magnetic field. A large ME voltage coefficient of about 1,380 µV/cm/Oe was observed for 10 % CoFe2O4 + 90 % Ba0.9Sr0.1TiO3 composite.