Oxygen mobility in SmBa2Cu3O7-delta measured by anelastic spectroscopy

Artículos de revistas

Fecha

2006-12-20

Registro en:

Materials Science and Engineering A-structural Materials Properties Microstructure and Processing. Lausanne: Elsevier B.V. Sa, v. 442, n. 1-2, p. 79-81, 2006.

0921-5093

http://hdl.handle.net/11449/36234

10.1016/j.msea.2006.04.132

WOS:000242975700016

2949983867418338

0000-0002-3336-309X

Autor

Universidade Estadual Paulista (Unesp)

Universidade Federal do Espírito Santo (UFES)

Institución

Universidade Estadual Paulista (Brasil)

Resumen

Anelastic spectroscopy has been performed on a sample of superconducting oxide SmBa2Cu3O7-delta (SBCO) using a torsion pendulum operating with frequency around 10 Hz. A thermally activated relaxation peak is observed near 500 K with the activation enthalpy of 1.55 +/- 0.03 eV and the pre-exponential factor of approximately 10(-15) s, which is attributed to the mobility of non-stoichiometric oxygen by jumps in positions O1 and O5 of the lattice. (c) 2006 Elsevier B.V. All rights reserved.

Materias

anelasticity

SBCO oxides

non-stoichiometric oxygen

internal friction

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