do Nascimento, R. M.Gimenez, J. M. A.Grandini, Carlos Roberto [UNESP]Cunha, A. G.2014-05-202014-05-202006-12-20Materials Science and Engineering A-structural Materials Properties Microstructure and Processing. Lausanne: Elsevier B.V. Sa, v. 442, n. 1-2, p. 79-81, 2006.0921-5093http://hdl.handle.net/11449/36234Anelastic 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.79-81enganelasticitySBCO oxidesnon-stoichiometric oxygeninternal frictionArtigo10.1016/j.msea.2006.04.132WOS:000242975700016Acesso restrito29499838674183380000-0002-3336-309X