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 alpha(E) similar to 73 mV/cm Oe achieved in sample x = 0.50 containing equal mole fractions of both the component phases. This value of alpha(E) is an order of magnitude higher than that of particulate sintered BaTiO3-CoFe2O4 composites (similar to 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. (C) 2012 Elsevier Ltd. All rights reserved.