Current-induced magnetization switching in magnetic multilayers with interlayer exchange coupling by dual spin-orbit torque

The current-induced magnetization switching was investigated for Pt/Co/Ir/Co/Pt films. The measurements based on the conventional four-probe method and the domain structure imaging revealed that the macroscopic switching process for Pt/Co/Ir/Co/Pt is considerably dependent on magnetic structures. The dynamics of spin-orbit torque switching are also shown using the macrospin numerical calculation for both the antiferromagnetically- and ferromagnetically-coupled cases sandwiched by spin Hall layers. The present results provide the macroscopic and microscopic pictures of switching mechanism for the interlayer exchange-coupled systems with dual spin-orbit torque and a guideline to design a spintronic device with high-efficient operation.