Effect of hydrogen absorption on superconductivity in YBa2Cu3O6.91and GdBa2Cu3O6.89

Hironobu Fujii, Hirofumi Kawanaka, Wei Ye, Shinichi Orimo, Hitoshi Fukuba

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67 Citations (Scopus)


Measurements of lattice constants and ac susceptibility have been performed on YBa2Cu3O6.91Hxand GdBa2Cu3O6.89Hxwith x<2.0. The lattice constant a increases with increasing x, whereas the parameters b and c decrease slightly with x up to x=0.8. An orthorhombic to tetragonal transition occurs at x=0.80 for both the hydrides, after which the parameter c becomes almost constant for x up to x=1.8 in spite of the increase of the parameter a with x. The superconducting transition temperature Tcremains unchanged with x in the Y hydride system, while Tcdecreases slightly with x up tox=1.0 in the Gd hydride system. The diamagnetic signal is weakened by hydrogenation for both hydrides.

Original languageEnglish
Pages (from-to)L525-L528
JournalJapanese Journal of Applied Physics
Issue number4A
Publication statusPublished - 1988 Apr


  • Ac susceptibility
  • Ceramics
  • Charge transfer
  • Gadolinium barium copper oxide
  • Heat treatment
  • Hydrogen absorption
  • Phase transition
  • Superconductivity
  • Yttrium barium copper oxide


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