Interfacial charge-mediated non-volatile magnetoelectric coupling in Co(0.3)Fe(0.7)/Ba(0.6)Sr(0.4)TiO(3)/Nb:SrTiO(3) multiferroic heterostructures

The central challenge in realizing non-volatile, E-field manipulation of magnetism lies in finding an energy efficient means to switch between the distinct magnetic states in a stable and reversible manner. In this work, we demonstrate using electrical polarization-induced charge screening to change the ground state of magnetic ordering in order to non-volatilely tune magnetic properties in ultra-thin Co(0.3)Fe(0.7)/Ba(0.6)Sr(0.4)TiO(3)/Nb:SrTiO(3) (001) multiferroic heterostructures. A robust, voltage-induced, non-volatile manipulation of out-of-plane magnetic anisotropy up to 40 Oe is demonstrated and confirmed by ferromagnetic resonance measurements. This discovery provides a framework for realizing charge-sensitive order parameter tuning in ultra-thin multiferroic heterostructures, demonstrating great potential for delivering compact, lightweight, reconfigurable, and energy-efficient electronic devices.