Schematic Diagram (IMAGE) National University of Singapore Caption Figure: (a) Schematic diagram illustrating the Dirac cone of topological insulator and spin-momentum locking. (b) Topological insulator/ferromagnet (Bi2Se3/NiFe) spin-orbit torque devices. (c-e) Magneto-optic Kerr effect (MOKE) images of highly efficient spin-orbit torque driven magnetization switching in Bi2Se3/NiFe by a pulsed current at room temperature and zero assistive magnetic field. Credit National University of Singapore Usage Restrictions Credit image accordingly to: National University of Singapore License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.