Magnetoelectric Properties Of (Ba_(0.85)Ca_(0.15))(Zr_(0.1)Ti_(0.9))O_3 -CoFe_2O_4 Particulate Composites

摘要

0.7[(Ba_(0.85)Ca_(0.15))(Zr_(0.1)Ti_(0.9))O_3)]-0.3[CoFe_2O4] multiferroic particulate ceramic composite with (0-3) connectivity has been synthesized by wet chemical methods. BCZT-CFO composite showed both polarization-electric field and magnetic hysteresis loops simultaneously at room temperature. A high dielectric constant of 2160 and tangent loss factor of 0.6 has been obtained. Magnetoelectric (ME) voltage coefficient (a_(ME)=dE/dH) of the composite was measured as a function of applied d.c magnetic field at different frequencies. At resonance frequency (365kHz) the composite showed a maximum a_(ME) of 102mV/cm.Oe. It was observed that the transverse ME coefficient is 1.8 times higher than the longitudinal ME coefficient. The magnetoelectric properties of this composite has been studied in detail in this work and correlated with its structure.