The ultimate limit of classical data storage is a single-atom magnetic bit. Researchers have now achieved the writing and reading of individual atoms whose magnetic information can be retained for several hours. See Letter p.226
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Sessoli, R. Single-atom data storage. Nature 543, 189–190 (2017). https://doi.org/10.1038/543189a
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DOI: https://doi.org/10.1038/543189a
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