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Tc-δ Relations in YB2Cu3O7-δ Thin Films: st]Effects of Oxygen Pressure During Growth

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Abstract

The Tc dependence on oxygen content was measured for YBa2Cu3O7-δ films grown with a variety of techniques (solid phase epitaxy, laser ablation, off-axis sputtering, co-evaporation) at oxygen pressures p(O2) ranging from 1.0 atm to 0.1 mTorr. Dissimilar dependences resulted for each film type, with Tc either increasing or decreasing for small increments in δ from maximum oxygen occupancy. Varying systematically with p(O2) during growth, the deviations are attributed to competing effects from hole-doping lattice defects (most likely on the Y-site) on the carrier density of the CuO2 planes and basal plane oxygen capacity, respectively, giving rise to overdoping or underdoping after low temperature oxidation in 1.0 atm of oxygen.

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Acknowledgement

This research was sponsored by the Division of Materials Science, U.S. Department of Energy under contract DE-AC05-840R21400 with Martin Marietta Energy Systems, Inc.

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Author notes

  1. V. C. Matijasevic

    Present address: Faculty of Applied Physics, Delft University of Technology, Lorentzweg 1, 2600 GA Delft, Netherlands

  2. C. B. Eom

    Present address: AT&T Bell Laboratories, 600 Mountain Ave., Murray Hill, NJ, 07974, USA

Authors and Affiliations

  1. Oak Ridge National Laboratory, P. O. Box 2008, Oak Ridge, TN, 37831-6057, USA

    R. Feenstra, D. P. Norton, J. D. Budai, D. K. Christen & D. H. Lowndes

  2. Department of Applied Physics, Stanford University, Stanford, CA, 94305, USA

    V. C. Matijasevic, C. B. Eom & T. H. Geballe

  3. AT&T Bell Laboratories, 600 Mountain Ave., Murray Hill, NJ, 07974-0634, USA

    E. S. Hellman & E. H. Hartford

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  1. R. Feenstra
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  2. D. P. Norton
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  3. J. D. Budai
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  4. D. K. Christen
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  5. D. H. Lowndes
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  6. V. C. Matijasevic
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  7. C. B. Eom
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  8. T. H. Geballe
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  9. E. S. Hellman
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  10. E. H. Hartford
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Feenstra, R., Norton, D.P., Budai, J.D. et al. Tc-δ Relations in YB2Cu3O7-δ Thin Films: st]Effects of Oxygen Pressure During Growth. MRS Online Proceedings Library 275, 101–106 (1992). https://doi.org/10.1557/PROC-275-101

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  • DOI: https://doi.org/10.1557/PROC-275-101

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