Yttrium barium copper oxide

Yttrium barium copper oxide, also called yttrium barium cuprate and abbreivated YBCO, is a type of inorganic compound. YBCO is a non-stoichiometric mixed oxide: it does not have a single chemical formula, instead depending on the ratio of the three metals and any oxygen vacancies.

YBCO compounds are named by the ratio of yttrium:barium:copper. For example, YBa2Cu3O7 is called Y123. The formula is also sometimes written YBa2Cu3O7−δ to show the oxygen vacancies.

Y123 was the first high-temperature superconductor to be discovered, as part of the mixed-phase compound Y1.2B0.8CuO4.[1] Single-phase Y123 was later prepared and patented by Bell Laboratories in 1987.[2]

Sources

  1. ↑ Wu, M. K.; Ashburn, J. R.; Torng, C. J.; Hor, P. H.; Meng, R. L.; Gao, L.; Huang, Z. J.; Wang, Y. Q.; Chu, C. W. (1987). "Superconductivity at 93 K in a new mixed-phase Y-Ba-Cu-O compound system at ambient pressure". Physical Review Letters. 58 (9): 908–910. Bibcode:1987PhRvL..58..908W. doi:10.1103/PhysRevLett.58.908. PMID 10035069.
  2. ↑ MacIlwain, Colin (2000). "Bell Labs win superconductivity patent". Nature. 403 (6766): 121–122. Bibcode:2000Natur.403..121M. doi:10.1038/35003008. PMID 10646568.
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