Studies on the Dielectric and the Magnetic Properties of Co-Mn Ferrite and BZT Ferroelectric Particulate Magnetoelectric Composites

Abstract

Magnetostrictive-piezoelectric heterostructures show strong magnetoelectric (ME) interactions that are mediated by mechanical forces. Magnetoelectric particulate composites of (0.1, 0.2, 0.3) mol% CoMn0.2Fe1.8O4 ‐ (0.9, 0.8, 0.7) mol% BaZr0.08Ti0.92O3 have been prepared by using the solid-state reaction method. X-ray diractometry patterns show a variation in the intensity of the spinel phase with ferrite content. The eect of the constituent phase variation on the B-H hysteresis behavior and the dielectric properties was examined. The dielectric constant shows the usual dielectric dispersion behavior with increasing frequency, which is due to the Maxwell-Wagnertype surface interfacial polarization. The dynamic transverse ME coecient, ME, of the composites has been measured at 850 Hz. A strong dependence of the ME response on the content of the ferrite phase was observed. This paper presents the results of our investigations of ME composites for their dielectric, magnetic and ME properties. The results along with the applicability of the materials in ME sensing devices are discussed with appropriate scientific reasons.