Supplementary Material

See the Supplementary Material for schematic representation of tetragonal distortion in BCZT and LSMO unit cells in the heterostructures, surface morphology of top BCZT thin film layer, XPS binding energy values of different constituent atoms of BCZT and LSMO layers, dM/dT curves for TC calculation, room temperature ferroelectric hysteresis loops, frequency dependence and temperature dependence of dielectric permittivity with and without applied magnetic field, for BCZT/LSMO/LAO and BCZT/LSMO/MgO thin film heterostructures.