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Epitaxial growth of Ba2YNbO6 films on biaxially-textured NiW substrates as a multifunctional single buffer layer for high Jc epitaxial YBCO film

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Abstract

Epitaxial Ba2YNbO6 (BYNO) films were deposited on textured NiW substrates via pulsed laser deposition. The films have dense and smooth surface structure, and more importantly, significantly improved out-of-plane texture, compared with the NiW substrate texture. Transmission electron microscopy study confirms the c-axis tilting of BYNO film and formation of misfit dislocations at NiW/BYNO interface, suggesting that the improved texture should be attributed to the tilted epitaxy via biased dislocation mechanism. YBa2Cu3O7_δ films deposited on BYNO single-buffered NiW substrates show further texture improvement, high superconducting transition temperature of ~91 K, and critical current density of 1.8 MA/cm2 at 77 K, self-field.

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Acknowledgments

C.C. acknowledges support by the Materials Sciences and Engineering Division Office of Basic Energy Sciences, U.S. Department of Energy.

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Authors and Affiliations

  1. Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA

    Sung Hun Wee, Claudia Cantoni & Amit Goyal

  2. Departments of Chemical Biological Engineering, Physics, and Electrical Engineering, SUNY, University at Buffalo, Buffalo, NY, 14260, USA

    Amit Goyal

Authors
  1. Sung Hun Wee
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  2. Claudia Cantoni
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  3. Amit Goyal
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Correspondence to Sung Hun Wee.

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Wee, S.H., Cantoni, C. & Goyal, A. Epitaxial growth of Ba2YNbO6 films on biaxially-textured NiW substrates as a multifunctional single buffer layer for high Jc epitaxial YBCO film. MRS Communications 5, 533–538 (2015). https://doi.org/10.1557/mrc.2015.62

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