  Low dimensional carbon-based materials are interesting because they can show
intrinsic $\pi$-magnetism associated to p-electrons residing in specific
open-shell configurations. Consequently, during the last years there have been
impressive advances in the field combining indirect experimental fingerprints
of localized magnetic moments with theoretical models. In spite of that, a
characterization of their spatial- and energy-resolved spin-moment has so far
remained elusive. To obtain this information, we present an approach based on
the stabilization of the magnetization of $\pi$-orbitals by virtue of a
supporting substrate with ferromagnetic ground state. Remarkably, we go beyond
localized magnetic moments in radical or faulty carbon sites: In our study,
energy-dependent spin-moment distributions have been extracted from spatially
extended one-dimensional edge states of chiral graphene nanoribbons. This
method can be generalized to other nanographene structures, representing an
essential validation of these materials for their use in spintronics and
quantum technologies.
