Structure and superconducting properties of nonstoichiometric YBa2Cu3Oy annealed at 300°C in a dry argon atmosphere View Full Text


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Article Info

DATE

2011-07-10

AUTHORS

S. G. Titova, Yu. V. Blinova, S. V. Sudareva, I. B. Bobylev, N. A. Zyuzeva, E. P. Romanov

ABSTRACT

Using the full-profile X-ray analysis of diffraction lines, the behavior of YBa2Cu3Oy nonstoichiometric ceramics upon annealing at 300°C in a dry inert atmosphere has been investigated. It has been established that, in the YBa2Cu3O6.3 sample with the initial tetragonal structure, this treatment leads to nucleation of an orthophase with a low degree of rhombicity, which becomes prevailing after annealing for 56 h. In this case, superconductivity with an initial temperature of the transition of ∼50 K occurs in the sample. In the YBa2Cu3O6.7 sample with the initial orthorhombic structure, the orthophase with a somewhat enhanced rhombicity arises during annealing and becomes prevailing after annealing for 56 h; in this case, Tc of the system grows from 57 to 63 K. Data of the magnetic measurements for both cases can be interpreted as the presence of two orthorhombic phases with different temperatures of transition to the superconducting state in the samples after annealing. More... »

PAGES

1448-1451

Identifiers

URI

http://scigraph.springernature.com/pub.10.1134/s1063783411070286

DOI

http://dx.doi.org/10.1134/s1063783411070286

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1008336922


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