Orbital Magnetic Moment Controlled Converse Magnetoelectric Effect in bcc‐Co 3 Mn/Fe/V/PMN‐PT Multiferroic Heterostructures

ABSTRACT To demonstrate multiferroic heterostructures with a giant converse magnetoelectric (CME) effect, we propose a material design strategy based on utilizing the control of orbital magnetic moments. Following this strategy, we focus on a multiferroic heterostructure composed of (211)‐oriented metastable body‐centered cubic (bcc) ferromagnetic Co 3 Mn, which is predicted to exhibit a significant change in magnetic anisotropy due to in‐plane piezostrain. By inserting an appropriate Fe/V layer, we experimentally obtain a highly (211)‐oriented bcc Co 3 Mn layer on piezoelectric Pb(Mg 1/3 Nb 2/3 )O 3 ‐PbTiO 3 (011). Using this structure, we reproducibly show a giant CME effect with repeatable and nonvolatile magnetization vector switching. Our proposal is one of the important strategies toward the development of room‐temperature electric‐field‐controlled spintronic devices with ultra‐low power consumption.