Investigation of magneto-electric effects in (PMN-PT) @ NiFe2O4 core shell nanostructures and nanocomposites for non volatile memory applications

Abstract We studied structural, ferroelectric, magnetic and magneto-electric (ME) properties of (0.65Pb(Mg1/3Nb2/3)O3-0.35PbTiO3) (PMN-PT)/NiFe2O4 nanocomposite and core shell nanostructures (with ferrimagnetic NiFe2O4 core and ferroelectric PMN-PT shell). Morphology of core shell nanostructures and nanocomposites have been analyzed using transmission electron microscopy and scanning electron microscopy. Both the PMN-PT)/NiFe2O4 samples reveal magneto electric effect at room temperature. The ME coupling coefficient (α) was found to be two order of magnitude higher for PMN-PT)/NiFe2O4 nanocomposites in comparison to the core shell nanostructures. The PMN-PT/NiFe2O4 nano composite showed repeatable and reversible switching of α (α > 0 and α 0 and α