Fig. 8: Interlayer DMI induced field-free SOT switching.

a The measurement configuration of SOT switching in Pt/Co/Pt/Co/Pt and Pt/Co/Pt/Ir/Pt/Co/Pt based Hall devices. b Field-free SOT switching loops at different φ_j for the FM coupled Pt/Co/Pt/Co/Pt sample. The switching loops disappeared at φ_j = 90° and 270°. c Resistance change (ΔR) and critical current (J_c) of the switching as functions of φ_j. d Switching dynamics driven by a pulse current parallel to D. Figures a-d are reprinted from ref. ⁶⁸ with permission. e MOKE image of the Hall device after the application of a current pulse. Reprinted from ref. ⁷¹ with permission.