“…However, recent experiments in the rare earth garnets 44 suggest that a proximate high-SOC layer is not required, and the magnetic ion in the magnetic film itself provides the critical SOC responsible for DMI, irrespective of the SOC of the interfacing material. Indeed, in perpendicularly-magnetized iron garnets, rare-earth orbital magnetism has given rise to an intrinsic spin-orbit coupling generating interfacial DMI at mirror symmetry-breaking interfaces 45 . Moreover, recent findings showing that the rare-earth ion substitution and strain engineering can significantly alter the DMI 44 , 46 , remain to be understood.…”