Critical currents and magnetization decay in oxygen deficient YBa2Cu3O7-δ thin films

B. M. Lairson; J. L. Vargas; S. K. Streiffer; D. C. Larbalestier; J. C. Bravman

doi:10.1016/0921-4534(91)91205-I

Critical currents and magnetization decay in oxygen deficient YBa₂Cu₃O_7-δ thin films

B. M. Lairson, J. L. Vargas, S. K. Streiffer, D. C. Larbalestier, J. C. Bravman

Oak Ridge National Laboratory

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

3 Scopus citations

Abstract

In-situ grown c-axis YBa₂Cu₃O_7-δ films deposited onto MgO single crystal substrates were equilibrated at various points in the temperature-oxygen pressure phase diagram to adjust the oxygen stoichiometry. Critical currents, which were 1-4×10⁷ A/cm² before oxygen removal, were reduced somewhat by oxygen removal, but remained high. An exponential relation between critical current and temperature was observed at low temperature for both as-grown and for de-oxygenated films. Magnetization decay measurements showed stronger relaxation in the oxygen deficient films, indicative of weaker flux pinning.

Original language	English
Pages (from-to)	2161-2162
Number of pages	2
Journal	Physica C: Superconductivity and its Applications
Volume	185-189
Issue number	PART 4
DOIs	https://doi.org/10.1016/0921-4534(91)91205-I
State	Published - Dec 1 1991

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title = "Critical currents and magnetization decay in oxygen deficient YBa2Cu3O7-δ thin films",

abstract = "In-situ grown c-axis YBa2Cu3O7-δ films deposited onto MgO single crystal substrates were equilibrated at various points in the temperature-oxygen pressure phase diagram to adjust the oxygen stoichiometry. Critical currents, which were 1-4×107 A/cm2 before oxygen removal, were reduced somewhat by oxygen removal, but remained high. An exponential relation between critical current and temperature was observed at low temperature for both as-grown and for de-oxygenated films. Magnetization decay measurements showed stronger relaxation in the oxygen deficient films, indicative of weaker flux pinning.",

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AU - Lairson, B. M.

AU - Vargas, J. L.

AU - Streiffer, S. K.

AU - Larbalestier, D. C.

AU - Bravman, J. C.

PY - 1991/12/1

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N2 - In-situ grown c-axis YBa2Cu3O7-δ films deposited onto MgO single crystal substrates were equilibrated at various points in the temperature-oxygen pressure phase diagram to adjust the oxygen stoichiometry. Critical currents, which were 1-4×107 A/cm2 before oxygen removal, were reduced somewhat by oxygen removal, but remained high. An exponential relation between critical current and temperature was observed at low temperature for both as-grown and for de-oxygenated films. Magnetization decay measurements showed stronger relaxation in the oxygen deficient films, indicative of weaker flux pinning.

AB - In-situ grown c-axis YBa2Cu3O7-δ films deposited onto MgO single crystal substrates were equilibrated at various points in the temperature-oxygen pressure phase diagram to adjust the oxygen stoichiometry. Critical currents, which were 1-4×107 A/cm2 before oxygen removal, were reduced somewhat by oxygen removal, but remained high. An exponential relation between critical current and temperature was observed at low temperature for both as-grown and for de-oxygenated films. Magnetization decay measurements showed stronger relaxation in the oxygen deficient films, indicative of weaker flux pinning.

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U2 - 10.1016/0921-4534(91)91205-I

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SN - 0921-4534

VL - 185-189

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JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - PART 4

ER -

Critical currents and magnetization decay in oxygen deficient YBa₂Cu₃O_7-δ thin films

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