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ME Composites of y(Ni0.5Zn0.3Co0.2Fe2O4)+(1-y) (BaTiO3) with y = 0.1, 0.2, 0.3, 0.4 and 0.5 were prepared by standard double sintering method. The interfaces play very important roles in the dielectric properties, causing space charge effects and Maxwell-Wagner relaxation, particularly at low frequencies. The presence of ferrite and ferroelectric phases without any impurity was confirmed by X-ray diffraction. Because of the hysteresis nature, the ME effect the composites may find applications in memory devices such as ME data storage and switching. In the present work, the possibility of forming ferroelectric-ferromagnetic ceramics has been investigated. The Dielectric constants as a function of frequency were studied for different compositions. The loss tangent as a function of frequency was studied for different compositions. The combined ferroelectric and magnetic ordering will result in magneto-electric coupling in this material; further investigations are necessary which may throw light on improvement in the product properties. Keywords: XRD, SEM, Dielectric constant, loss tangent

Frequency dependent Dielectric Properties of Ni-Zn-Co ferrite and Barium Titanate ferroelectric ME composites