Interfacial Control via Reversible Ionic Motion in Battery?Like Magnetic Tunnel Junctions

Electrical control on interfaces is one of the key approaches to harvest advanced functionalities in modern electronic devices. In this work, it proposed and demonstrated that a “battery-like” tunnel junction structure can be embedded with added via reversible lithium-ion motion. model system FeCo/FeCoOx/LiF/FeCo magnetic junctions, ultrathin LiF barrier makes strong electric fields possible under moderate applied voltages, therefore electrically drive migration within barrier. The ion motion subsequently leads interfacial modifications generates over thousand percent resistance change across Meanwhile, sizable tunneling magnetoresistance persists even reverses sign spin polarization as function control. devices are responsive both field manipulations, giving rise diverse nonvolatile functionalities.