Oxygen diffusion in superconducting YBa2Cu3O7-δ oxides in ambient helium and oxygen

K. N. Tu; C. C. Tsuei; S. I. Park; A. Levi

doi:10.1103/PhysRevB.38.772

Oxygen diffusion in superconducting YBa₂Cu₃O_7-δ oxides in ambient helium and oxygen

K. N. Tu, C. C. Tsuei, S. I. Park, A. Levi

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

65 Citations (Scopus)

Abstract

In situ resistivity measurement has been used to monitor diffusion of oxygen in and out of bulk and polycrystalline YBa₂Cu₃O_7-δ in ambient O₂ and He atmospheres. The out-diffusion of oxygen from the oxide is found to be independent of δ and its rate is surface-reaction limited with an activation energy of 1.7 eV. The in-diffusion depends strongly on δ; the activation energies of the process at δ≅0 and δ =0.38 are 1.1 and 0.48 eV, respectively. The latter is taken to be the activation energy of motion and the former, the activation energy of diffusion. On the basis of the kinetic and published structural information, we have proposed a defect mechanism in the CuO plane for the anisotropic diffusion of oxygen in the oxide. © 1988 The American Physical Society.

Original language	English
Pages (from-to)	772-775
Journal	Physical Review B
Volume	38
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevB.38.772
Publication status	Published - 1 Jul 1988
Externally published	Yes

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Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

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title = "Oxygen diffusion in superconducting YBa2Cu3O7-δ oxides in ambient helium and oxygen",

abstract = "In situ resistivity measurement has been used to monitor diffusion of oxygen in and out of bulk and polycrystalline YBa2Cu3O7-δ in ambient O2 and He atmospheres. The out-diffusion of oxygen from the oxide is found to be independent of δ and its rate is surface-reaction limited with an activation energy of 1.7 eV. The in-diffusion depends strongly on δ; the activation energies of the process at δ≅0 and δ =0.38 are 1.1 and 0.48 eV, respectively. The latter is taken to be the activation energy of motion and the former, the activation energy of diffusion. On the basis of the kinetic and published structural information, we have proposed a defect mechanism in the CuO plane for the anisotropic diffusion of oxygen in the oxide. {\textcopyright} 1988 The American Physical Society.",

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AU - Tu, K. N.

AU - Tsuei, C. C.

AU - Park, S. I.

AU - Levi, A.

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

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N2 - In situ resistivity measurement has been used to monitor diffusion of oxygen in and out of bulk and polycrystalline YBa2Cu3O7-δ in ambient O2 and He atmospheres. The out-diffusion of oxygen from the oxide is found to be independent of δ and its rate is surface-reaction limited with an activation energy of 1.7 eV. The in-diffusion depends strongly on δ; the activation energies of the process at δ≅0 and δ =0.38 are 1.1 and 0.48 eV, respectively. The latter is taken to be the activation energy of motion and the former, the activation energy of diffusion. On the basis of the kinetic and published structural information, we have proposed a defect mechanism in the CuO plane for the anisotropic diffusion of oxygen in the oxide. © 1988 The American Physical Society.

AB - In situ resistivity measurement has been used to monitor diffusion of oxygen in and out of bulk and polycrystalline YBa2Cu3O7-δ in ambient O2 and He atmospheres. The out-diffusion of oxygen from the oxide is found to be independent of δ and its rate is surface-reaction limited with an activation energy of 1.7 eV. The in-diffusion depends strongly on δ; the activation energies of the process at δ≅0 and δ =0.38 are 1.1 and 0.48 eV, respectively. The latter is taken to be the activation energy of motion and the former, the activation energy of diffusion. On the basis of the kinetic and published structural information, we have proposed a defect mechanism in the CuO plane for the anisotropic diffusion of oxygen in the oxide. © 1988 The American Physical Society.

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M3 - RGC 21 - Publication in refereed journal

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JF - Physical Review B

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