Paper Title:
Oxygen Interstitial Dynamics in Bi2Sr2CaCu2O8+δ Oxides Measured by Mechanical Spectroscopy
  Abstract

Many researchers became interested in the discovery of Bi2Sr2CaCu2O8+δ oxides with critical temperature of around 80 K. It is known that the critical temperature is related to the CuO2 planes of the material. For this reason, the study of the interstitial oxygen in these oxides is of great relevance. The samples were prepared by means of conventional solid state reactions, through the stoichiometric mixture of precursory powders. After the sinterization, the samples were submitted to measurements of density, electrical resistivity, x-ray diffraction, scanning electron microscopy and energy dispersion spectroscopy, with the objective of performing their characterization. The measurements of mechanical spectroscopy were performed by a torsion pendulum. The results show three relaxation processes in the temperature range of 200 and 700 K, with activation energy of approximately 0.9 eV, which has been attributed to the dynamics of the interstitial oxygen present in the material.

  Info
Periodical
Materials Science Forum (Volumes 591-593)
Edited by
Lucio Salgado and Francisco Ambrozio Filho
Pages
634-638
DOI
10.4028/www.scientific.net/MSF.591-593.634
Citation
C. R. Grandini, S.L.M. Ruiz, M.R. Silva, J.M.A. Gimenez, E. A. A. Rubo, "Oxygen Interstitial Dynamics in Bi2Sr2CaCu2O8+δ Oxides Measured by Mechanical Spectroscopy", Materials Science Forum, Vols. 591-593, pp. 634-638, 2008
Online since
August 2008
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