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Cation nonstoichiometry and its contribution to the nanostructured inhomogeneity of tetra and ortho modifications of YBa2Cu3O7 − δ oxide

  • Proceedings of the International Symposium “Environments with Structural and Magnetic Ordering” Multiferroics 4
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Bulletin of the Russian Academy of Sciences: Physics Aims and scope

Abstract

The cation composition and structure of YBa2Cu3O7 − δ (YBCO, the 123 phase) oxide samples synthesized at 990°C in air and annealed in oxygen at 450°C are studied via elemental analysis in a transmission electron microscope and high-resolution electron microscopy. The occurrence of cation nonstoichiometry and nanostructured inhomogeneity of the 123 phase in tetragonal and orthorhombic (superconducting) structures is confirmed. The nanostructured inhomogeneity of the 123 phase is attributed to the presence of nanocrystallites (2–5 nm) of oxides with different cation compositions belonging to the Y n Ba m Cu m + n O y series.

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Authors and Affiliations

  1. Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, Moscow oblast, 142432, Russia

    L. A. Klinkova

  2. Institute of Microelectronic Technology and High-Purity Materials, Russian Academy of Sciences, Chernogolovka, Moscow oblast, 142432, Russia

    V. I. Nikolaichik

Authors
  1. L. A. Klinkova
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  2. V. I. Nikolaichik
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Corresponding author

Correspondence to L. A. Klinkova.

Additional information

Original Russian Text © L.A. Klinkova, V.I. Nikolaichik, 2014, published in Izvestiya Rossiiskoi Akademii Nauk. Seriya Fizicheskaya, 2014, Vol. 78, No. 8, pp. 980–982.

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Klinkova, L.A., Nikolaichik, V.I. Cation nonstoichiometry and its contribution to the nanostructured inhomogeneity of tetra and ortho modifications of YBa2Cu3O7 − δ oxide. Bull. Russ. Acad. Sci. Phys. 78, 751–753 (2014). https://doi.org/10.3103/S1062873814080188

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  • DOI: https://doi.org/10.3103/S1062873814080188

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