Abstract
The influence of hot forging temperature on microstructure and magnetoelectric properties in (0.8)Pb(Mg1/3Nb2/3)0.68Ti0.32O3+(0.2) NiFe2O4 particulate composites were investigated. Samples sintered at intermediate stage of sintering show inter-diffusion and high conductivity resulting in low magnetoelectric coupling related to charge leak current. Composites sintered before the initial stage of sintering show apparent density aprox. 90% and low magnetoelectric coefficient due to poor mechanical coupling between phases. Composites sintered at initial stage of sintering showed improved apparent density (>98%) and resistivity (>108 Ωm). These characteristics allowed an enhancement of magnetoelectric coupling (∼6 mV/cmOe) due to control of inter-diffusion added to enhancement of the microstructural properties.
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