Formation of a stable shell of YBa sub 2 Cu sub 4 O sub 8 upon oxygen outdiffusion from superconducting YBa sub 2 Cu sub 3 O sub 7 minus. delta. oxides

Journal Article · Mon Oct 14 04:00:00 EDT 1991 · Applied Physics Letters; (United States)

DOI:https://doi.org/10.1063/1.106125· OSTI ID:5293728

Shi, L T; Tu, K N ^[1]

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1. IBM Research Division, Thomas J. Watson Research Center, Yorktown Heights, New York (USA)

A stable shell of YBa{sub 2}Cu{sub 4}O{sub 8} (124) forms in powder and sintered bulk YBa{sub 2}Cu{sub 3}O{sub 7{minus}}{sub {delta}} (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.

• OSTI ID: 5293728
• Journal Information: Applied Physics Letters; (United States), Journal Name: Applied Physics Letters; (United States) Vol. 59:16; ISSN APPLA; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
CHEMICAL ANALYSIS
COPPER COMPOUNDS
COPPER OXIDES
DIFFUSION
GRAVIMETRIC ANALYSIS
HIGH-TC SUPERCONDUCTORS
OXIDES
OXYGEN COMPOUNDS
PHASE STUDIES
QUANTITATIVE CHEMICAL ANALYSIS
SHELLS
SUPERCONDUCTORS
THERMAL ANALYSIS
THERMAL DIFFUSION
THERMAL GRAVIMETRIC ANALYSIS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES