Dielectric and magnetoelectric properties of BaTiO3–Co0.6Zn0.4Fe1.7Mn0.3O4 composite

In this paper we studied the structural, dielectric, magnetic and magnetoelectric properties of (x)BaTiO3–(1 − x)Co0.6Zn0.4Fe1.7Mn0.3O4 particulate composite series where x = 0.50, 0.60 and 0.70. BaTiO3–Co0.6Zn0.4Fe1.7Mn0.3O4 composite has the advantage of being non-toxic and environmental friendly from the point of view of device fabrication. High ME voltage coefficients were obtained in the whole series with the highest value of αE ∼ 73 mV/cm Oe achieved in sample x = 0.50 containing equal mole fractions of both the component phases. This value of αE is an order of magnitude higher than that of particulate sintered BaTiO3–CoFe2O4 composites (∼2–4 mV/cm Oe). Dielectric characteristics for these samples indicated two anomalies: (i) one at low temperature close to ferroelectric to paraelectric transition temperature of pure BaTiO3 and (ii) another at higher temperature related to the magnetic transition in ferrite, a characteristic dielectric feature of composite sample.