A sub-ns three-terminal spin-orbit torque induced switching device

We show a three-terminal spintronics memory device, which can be reliably switched by 0.5-ns current pulses with small magnitude. A new device geometry is employed, where spin-orbit torque is used for the write operation. We also show that an improved structure realizes magnetic field-free switching and employing a material other than the standard Ta can lead to a reduction of the switching current by more than half.