The ferromagnetism of iron has been known for millennia. Now a rotational form of spontaneous crystallographic ordering has been discovered. This touches upon fundamental questions about the relation between symmetry, structure and order in matter.
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Fiebig, M. Order! Order!!. Nat. Phys. 16, 9–10 (2020). https://doi.org/10.1038/s41567-019-0714-2
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DOI: https://doi.org/10.1038/s41567-019-0714-2
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