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

Research output: Contribution to journal › Article › peer-review

20 Citations (Scopus)

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

ASJC Scopus subject areas

Condensed Matter Physics

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title = "Direct measurements of room-temperature oxygen diffusion in YBa2Cu3Ox",

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.",

author = "R. Mogilevsky and R. Levi-Setti and B. Pashmakov and Li Liu and K. Zhang and Jaeger, {H. M.} and Buchholz, {D. B.} and Chang, {Robert P. H.} and Veal, {B. W.}",

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T1 - Direct measurements of room-temperature oxygen diffusion in YBa2Cu3Ox

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.

PY - 1994

Y1 - 1994

N2 - 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.

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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