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Anisotropy of High-Temperature Superconductivity in the (100) Plane of YBa2Cu3O7 Film

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Abstract

A film of high-temperature superconductor (HTSC) YBa2Cu3O7 has been grown on the (100) crystallographic plane of SrLaGaO4 crystal using pulse laser deposition. An X-ray diffraction (XRD) analysis has shown that this film is single-crystal, single-domain, and oriented in the (100) plane. The superconducting transition occurs at 88.8 K and has a width of 1.6 K. Measurements of the temperature dependence of electrical resistance in these films revealed a significant anisotropy of superconductivity in the (100) plane. Due to this specific feature, the critical superconducting-transition temperature, found by measuring the temperature dependence of resistance in the film plane oriented parallel to the CuO planes, exceeded the corresponding value obtained by the same measurement in the direction perpendicular to these planes by 2 K. In addition, it is revealed experimentally that the normal resistance in the former case is smaller than in the latter case by a factor of about 400.

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ACKNOWLEDGMENTS

I am grateful to A.A. Lomov, the Chief Researcher of the Valiev Institute of Physics and Technology of the Russian Academy of Sciences, for providing access to the equipment of the institute for experiments with deposition of thin films and their lithography and to R. Arpaia, a Doctor of Physics and Mathematics, for the help in carrying out electrical measurements.

Funding

This study was supported by the Ministry of Science and Higher Education of the Russian Federation within a State assignment for the Federal Scientific Research Centre “Crystallography and Photonics” of the Russian Academy of Sciences.

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Authors and Affiliations

  1. Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics,” Russian Academy of Sciences, 119333, Moscow, Russia

    E. A. Stepantsov

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  1. E. A. Stepantsov
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Correspondence to E. A. Stepantsov.

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Translated by A. Sin’kov

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Stepantsov, E.A. Anisotropy of High-Temperature Superconductivity in the (100) Plane of YBa2Cu3O7 Film. Crystallogr. Rep. 67, 436–440 (2022). https://doi.org/10.1134/S1063774522030208

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  • DOI: https://doi.org/10.1134/S1063774522030208

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