Previous demonstrations of long-range supercurrents through magnetic materials were achieved only at liquid helium temperatures. Now, using specially tailored samples, long-distance supercurrents have been realized at temperatures as high as 40 K.
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Birge, N.O. Supercurrents in magnetic materials heat up. Nat. Mater. 21, 137–138 (2022). https://doi.org/10.1038/s41563-021-01189-8
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DOI: https://doi.org/10.1038/s41563-021-01189-8