Abstract
The upper critical field (Hc2) of the high-Tc superconductor YBa2CU3O7–x (YBCO) is expected to be >100T at 0 K1–6. Because magnetic fields of >100 T can be produced only for a short time and by destructive methods, direct measurements of Hc2 at these field strengths have not so far been performed. Here we report the first observation of superconductivity at >100 T, using a method in which a voltage induced by a magnetization jump is measured in pulsed high magnetic fields. Superconductivity in YBCO was confirmed up to 101 T at 6 K.
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Nakao, K., Miura, N., Tatsuhara, K. et al. Superconductivity in Yba2Cu3O7–x in a 100 tesla magnetic field. Nature 332, 816–818 (1988). https://doi.org/10.1038/332816a0
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