Thermal recovery of oxygen-deficient superconducting YBa/sub 2/Cu/sub 3/O/sub 7-//sub delta/ oxides in ambient oxygen

Journal Article · Thu Sep 01 04:00:00 EDT 1988 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.38.5118· OSTI ID:6790696

Tu, K N; Yeh, N C; Park, S I; Tsuei, C C

We have annealed the oxygen-deficient ceramic oxide YBa/sub 2/Cu/sub 3/O/sub 7-//sub delta/, where delta = 0.4, in ambient oxygen to obtain in-diffusion of oxygen. In situ resistivity measurements were used to monitor annealing at constant heating rates between room temperature and 570 /sup 0/C. The resistivity curve showed a maximum and a minimum. The temperatures where the maximum and the minimum were observed change with heating rate. By measuring their dependence on heating rate, which was varied from 15 to 0.1 /sup 0/C/min, we have determined the activation energy of oxygen diffusion in the oxide (delta = 0) to be 1.35 +- 0.10 eV. The in-diffusion is limited by a near-surface layer which requires the measured activation energy for oxygen to diffuse through it.

• Research Organization: IBM Research Division, Thomas J. Watson Research Center, Yorktown Heights, New York 10598
• OSTI ID: 6790696
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 38:7; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

656100* -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ACTIVATION ENERGY
ANNEALING
DIFFUSION
ELEMENTS
ENERGY
ENHANCED RECOVERY
HEAT TREATMENTS
NONMETALS
OXYGEN
PROBES
RECOVERY
SUBSTOICHIOMETRY
SUPERCONDUCTORS
THERMAL RECOVERY
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS