Oxygen mobility in SmBa2Cu3O7-delta measured by anelastic spectroscopy
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Data
2006-12-20
Autores
do Nascimento, R. M.
Gimenez, J. M. A.
Grandini, Carlos Roberto [UNESP]
Cunha, A. G.
Título da Revista
ISSN da Revista
Título de Volume
Editor
Elsevier B.V.
Resumo
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.
Descrição
Palavras-chave
anelasticity, SBCO oxides, non-stoichiometric oxygen, internal friction
Como citar
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.