Ultrafast spintronic integrated circuits

Spin-orbit torque (SOT) arises from the spin-orbit coupling of non-magnetic heavy metals or interfacial interaction. It allows electrical switching or high frequency oscillation of magnetization for ultrafast and reliable Magnetic RAM (MRAM). This paper presents an overview of SOT-Related spin transfer nano-oscillators and MRAM, which have become hot research topics in the past decade. Firstly, we introduce the underlying physical mechanism, typical device structures and recent progress. Afterwards, the simulation demonstrates the fast switching operation beyond spin transfer torque switching mechanism. In the end, we discuss the bottleneck and application perspectives of SOT-Related devices.