Thermal Expansion and Oxygen Nonstoichiometry in High‐ T  c  YBa 2 Cu 3 O x  Superconductor | Zendy

Olekhnovich N. M. | Zendy; Zhabko T. E. | Zendy; Orlova N. S. | Zendy; Janovich V. D. | Zendy; Pashkovskii O. I. | Zendy; Zykova T. L. | Zendy

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Thermal Expansion and Oxygen Nonstoichiometry in High‐ T c YBa 2 Cu 3 O x Superconductor

Author(s) -

Olekhnovich N. M.,

Zhabko T. E.,

Orlova N. S.,

Janovich V. D.,

Pashkovskii O. I.,

Zykova T. L.

Publication year - 1991

Publication title -

crystal research and technology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.377

H-Index - 64

eISSN - 1521-4079

pISSN - 0232-1300

DOI - 10.1002/crat.2170260614

Subject(s) - thermal expansion , superconductivity , anisotropy , oxygen , ceramic , oxide , materials science , lattice (music) , thermal , lattice constant , transition temperature , analytical chemistry (journal) , chemistry , condensed matter physics , thermodynamics , composite material , metallurgy , chromatography , diffraction , organic chemistry , physics , quantum mechanics , acoustics , optics

The lattice parameters as well as the axial thermal expansion coefficients for YBa 2 Cu 3 O x superconducting oxide ceramics with different oxygen content ranging from × = 6.14 to × = 6.95 are determined as a function of temperature between 80 and 400 K using X‐ray powder diffractometry technique. The effect of oxygen concentration on the thermal expansion behaviour is regarded. The values of α are found to decrease with the oxygen content reducing and depend on the condition of heat treatment. The essential anisotropy of thermal expansion is shown to exist, with α c being larger than α a and α b . The relationship between α a and α b depends both on the sample preparation conditions and temperature.

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