Abstract
The structural, dielectric, ferroelectric and magnetoelectric (ME) properties of multiferroic [PbTiO3-Ni0.5Co0.5Fe2O4] (PT-NCF) composites have been discussed at room temperature. The uniformly distributed two-phase composites of PbTiO3 (ferroelectric) dispersed into nano-sized Ni0.5Co0.5Fe2O4 (ferromagnetic) of different particle size were synthesized by employing high energy ball milling for 12, 24 and 48 h respectively. The phase and morphology of composites were confirmed by XRD and SEM analysis respectively. The dielectric properties were determined at different frequencies (i.e. from 1 kHz to 1 MHz) and it is observed that the dielectric constant and ferroelectric transition temperature (TC) decreases with particle size. Further, the ferroelectric behavior of the composites was discussed at room temperature by examining the P-E loops. The magnetic and magnetoelectric measurements were performed to analyze the effect of particle size on ferromagnetic and magnetoelectric properties of PT-NCF composites. The coexistence of ferroelectric and ferromagnetic properties in composites with strong ME coupling is essential for a good multiferroic composites material and its applications.
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