The Ruderman--Kittel--Kasuya--Yosida (RKKY) interaction, a cornerstone of magnetism for over half a century, is now linked to a new frontier: interlayer Dzyaloshinskii--Moriya interaction (IL-DMI). In this study, the authors experimentally demonstrate that IL-DMI mediated by a Ru spacer exhibits a damped oscillatory behavior mirroring the classic RKKY signature. This discovery not only confirms the link between RKKY and IL-DMI but also unveils a new pathway for engineering chiral spin textures through spacer thickness control.
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Huang et al. (2025) studied this question.
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