Study of 0.1Ni0.8Zn0.2Fe2O4−0.9Pb1−3x/2LaxZr0.65Ti0.35O3 magnetoelectric composites

Magnetoelectric composites of nickel zinc ferrite (NZF) and La substituted lead zirconate titanate (PLZT) having representative formula 0.1Ni0.8Zn0.2Fe2O4−0.9Pb1−3x/2LaxZr0.65Ti0.35O3 (x=0, 0.01, 0.02 and 0.03) were synthesized by a conventional solid state route. X-ray diffraction analysis was carried out to confirm the coexistence of individual phases. Scanning electron microscope micrographs were taken for microstructural study of the samples. Dielectric properties were studied as a function of temperature and frequency. To study ferroelectric and magnetic ordering in composite samples, P–E and M–H hysteresis loops were recorded respectively. M–H hysteresis loops were taken for electrically poled and unpoled samples to confirm magnetoelectric coupling between the two phases (NZF and PLZT). La substitution results in significant improvement in dielectric, ferroelectric and piezoelectric properties of composite samples.

► Effect of La substitution on Ni–Zn ferrite–PZT composites.
► Observation of both P–E and M–H loops confirms ferroelectric and magnetic ordering.
► With La substitution, significant improvement in properties was observed.
► Increase in magnetization for electrically poled sample is evidence of ME coupling.