Abstract
We have investigated the room-temperature oxygen depletion in the near-surface region of YBa2Cu3Ox 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 10-18-10-19 cm2/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.
| Original language | English |
|---|---|
| Pages (from-to) | 6420-6423 |
| Number of pages | 4 |
| Journal | Physical Review B |
| Volume | 49 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 1994 |
ASJC Scopus subject areas
- Condensed Matter Physics
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Mogilevsky, R., Levi-Setti, R., Pashmakov, B., Liu, L., Zhang, K., Jaeger, H. M., Buchholz, D. B., Chang, R. P. H., & Veal, B. W. (1994). Direct measurements of room-temperature oxygen diffusion in YBa2Cu3Ox. Physical Review B, 49(9), 6420-6423. https://doi.org/10.1103/PhysRevB.49.6420