Ferroelectricity in bulk crystals of hafnium oxide demonstrates that these properties are not limited to films prepared by thin-film deposition techniques.
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Mikolajick, T., Schroeder, U. Ferroelectricity in bulk hafnia. Nat. Mater. 20, 718–719 (2021). https://doi.org/10.1038/s41563-020-00914-z
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DOI: https://doi.org/10.1038/s41563-020-00914-z
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