Voltage-driven charge-mediated fast 180 degree magnetization switching in nanoheterostructure at room temperature

Voltage-driven 180°magnetization switching without electric current provides the possibility for revolutionizing the spintronics.We demonstrated the voltage-driven charge-mediated 180°magnetization switching at room temperature by combining firstprinciples calculations and temperature-dependent magnetization dynamics simulation.The electric field(E)-induced interface charge is found to allow a giant modulation of the magnetic anisotropy(K)of the nanomagnet.Particularly K is revealed to vary linearly with respect to E and the epitaxial strain.Magnetization dynamics simulations using the so-obtained K show that both inplane and perpendicular 180°switching can be achieved by E pulses.The temperature effect renders the 180°switching as probability events.Statistical analysis indicates a fast(around 4 ns)and low-error-probability 180°switching achievable at room temperature by controlling the magnitude of E and the pulse width.The study inspires the rational design of miniaturized nanoscale spintronic devices where thermal fluctuation has a great impact.