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; Robert P. H. Chang; B. W. Veal

doi:10.1103/PhysRevB.49.6420

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, Robert P. H. Chang, B. W. Veal

Northwestern University

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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	https://doi.org/10.1103/PhysRevB.49.6420
Publication status	Published - 1994

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ASJC Scopus subject areas

Condensed Matter Physics

Cite this

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

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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.",

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AU - Mogilevsky, R.

AU - Levi-Setti, R.

AU - Pashmakov, B.

AU - Liu, Li

AU - Zhang, K.

AU - Jaeger, H. M.

AU - Buchholz, D. B.

AU - Chang, Robert P. H.

AU - Veal, B. W.

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AB - 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.

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10.1103/PhysRevB.49.6420