Direct measurements of room-temperature oxygen diffusion in YBa2Cu3Ox

R. Mogilevsky*, R. Levi-Setti, B. Pashmakov, Li Liu, K. Zhang, H. M. Jaeger, D. B. Buchholz, R. P.H. Chang, B. W. Veal

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

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 languageEnglish (US)
Pages (from-to)6420-6423
Number of pages4
JournalPhysical Review B
Volume49
Issue number9
DOIs
StatePublished - Jan 1 1994

ASJC Scopus subject areas

  • Condensed Matter Physics

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