Formation of a stable shell of YBa2Cu4O8 upon oxygen outdiffusion from superconducting YBa2Cu3O7-δ oxides

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Original languageEnglish
Pages (from-to)2040-2042
Journal / PublicationApplied Physics Letters
Issue number16
Publication statusPublished - 14 Oct 1991
Externally publishedYes


A stable shell of YBa2Cu4O8 (124) forms in powder and sintered bulk YBa2Cu3O7 (123) superconducting oxides upon oxygen outdiffusion from the latter and serves as a diffusion barrier to retard further oxygen outdiffusion. The 124 phase formation has been investigated by thermogravimetric analysis and x-ray diffraction. The better thermal stability of the 124 phase can be explained by the stronger bonding configuration of O(1) atoms in a double-chain structure.

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