The design of nanoscale organic–metal hybrids with tunable magnetic properties as well as the realization of controlled magnetic coupling between them open gateways for novel molecular spintronic devices. Progress in this direction requires a combination of a clever choice of organic and thin-film materials, advanced magnetic characterization techniques with a spatial resolution down to the atomic length scale, and a thorough understanding of magnetic properties based on first-principles calculations. Here, we make use of carbon-based systems of various nanoscale size, such as single coronene molecules and islands of graphene, deposited on a skyrmion lattice of a single atomic layer of iron on an iridium substrate, in order to tune the magnetic characteristics (for example, magnetic moments, magnetic anisotropies and coercive field strengths) of the organic–metal hybrids. Moreover, we demonstrate long-range magnetic coupling between individual organic–metal hybrids via the chiral magnetic skyrmion lattice, thereby offering viable routes towards spin nformation transmission between magnetically stable states in nanoscale dimensions.
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