  The magnetic interfacial Dzyaloshinskii-Moriya interaction (DMI) in
multi-layered thin films can lead to exotic chiral spin states, of paramount
importance for future spintronic technologies. Interfacial DMI is normally
manifested as an intralayer interaction, mediated via a paramagnetic heavy
metal in systems lacking inversion symmetry. Here we show how, by designing
synthetic antiferromagnets with canted magnetization states, it is also
possible to observe interfacial interlayer-DMI at room temperature. The
interlayer-DMI breaks the symmetry of the magnetic reversal process via the
emergence of noncollinear spin states, which results in chiral exchange-biased
hysteresis loops. This work opens up yet unexplored avenues for the development
of new chiral spin textures in multi-layered thin film systems.
