Magnetic domain-wall inverter and diode

Magnetic domain-walls (DWs) can be used for data storage as well as for performing logic operations. Whereas the research into current-driven DW motion has made tremendous progress in recent years, the realization of DW logic circuits has faced more challenges. In order to realize efficient and scalable DW logic circuits, it is desirable to perform logic operations using an electric current, which would allow for the individual addressing of the gates and minimal energy consumption. In recent work, we have demonstrated a current-driven DW logic scheme based on the chiral coupling between adjacent magnets induced by interfacial Dzyaloshinskii–Moriya interaction [1,2]. In this talk, we will first show how to construct a magnetic field- and current-driven DW inverter in a system with perpendicular anisotropy and then tailor the symmetry of the inverter to introduce non-reciprocity in the DW inversion process. We will show that such a device can work as a DW diode, thus extending the operation of DW logic to the AC signal regime. Our work illustrates how chirally coupled structures offer a versatile platform to design efficient DW logic devices [3].
[1] Z. Luo et al. Science 363, 1435 (2019)
[2] Z. Luo et al. Nature 579, 214 (2020)
[3] A. Hrabec et al. APL 17, 130503 (2020)