Direct measurements of room-temperature oxygen diffusion in YBa{sub 2}Cu{sub 3}O{sub {ital x}}

Journal Article · Tue Mar 01 00:00:00 EST 1994 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.49.6420· OSTI ID:142603

Mogilevsky, R; Levi-Setti, R ^[1]; Pashmakov, B; Liu, L; Zhang, K; Jaeger, H M ^[2]; Buchholz, D B; Chang, R P.H. ^[3]; Veal, B W ^[4]

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1. The Enrico Fermi Institute and Department of Physics, The University of Chicago, Chicago, Illinois 60637 (United States)
2. The James Franck Institute and Department of Physics, The University of Chicago, Chicago, Illinois 60637 (United States)
3. Materials Research Center, Northwestern University, Evanston, Illinois 60208 (United States)
4. Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)

We have investigated the room-temperature oxygen depletion in the near-surface region of YBa{sub 2}Cu{sub 3}O{sub {ital x}} samples kept under high vacuum. Results obtained from secondary-ion-mass-spectroscopy and four-probe-conductivity measurements are presented. The depletion process is limited by oxygen out diffusion in the samples with diffusion coefficients of 10{sup {minus}18}--10{sup {minus}19} cm{sup 2}/s. The reverse oxygen in-diffusion process occurs in oxygen atmosphere. The oxygen out-diffusion process can be accelerated by direct ultraviolet light (UV) irradiation of the samples in vacuum. The in-diffusion process is accelerated if UV light is used in oxygen atmosphere to produce ozone and atomic oxygen.

• OSTI ID: 142603
• Journal Information: Physical Review, B: Condensed Matter, Vol. 49, Issue 9; Other Information: PBD: 1 Mar 1994
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
YTTRIUM OXIDES
ATOM TRANSPORT
BARIUM OXIDES
COPPER OXIDES
OXYGEN
DIFFUSION
HIGH-TC SUPERCONDUCTORS
CUPRATES
PHYSICAL RADIATION EFFECTS
ULTRAVIOLET RADIATION
MASS SPECTROSCOPY
ELECTRIC CONDUCTIVITY