The exchange interaction between the electron spin in individual magnetic atoms and the spin of electrons in a non-magnetic substrate has a strong effect on the magnetic anisotropy of the atoms.
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Wulfhekel, W. The exchange changes everything. Nature Nanotech 9, 13–14 (2014). https://doi.org/10.1038/nnano.2013.295
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DOI: https://doi.org/10.1038/nnano.2013.295