De Albuquerque Gimenez, Juliana Maria [UNESP]Grandini, Carlos Roberto [UNESP]Santos, Dayse Iara dos [UNESP]Da Cunha, Alfredo Gonçalves2014-05-272014-05-272005-12-01Materials Science Forum, v. 498-499, p. 581-586.0255-5476http://hdl.handle.net/11449/68604Since the discovery of the high Tc superconductors, several works have been made about the different properties of these materials. Anelastic spectroscopy experiments are sensitive tools to the study of defects in solids and phase transitions. By this technique, we can distinguish the different types of atomic jumps that happen to different temperatures. The intensity of the peaks in the anelastic spectrum and the step in the torsional modulus are related with the concentration of the relaxing entities, and the position of the peaks is determined by its mobility. In this paper, the study on Bi and Sm based superconducting oxides was made by anelastic relaxation measurements using a torsion pendulum. The samples were submitted to successive thermal treatments in high vacuum, in the temperature range between 100 K and 650 K, heating rate about 1 K/min. For Bi based superconducting oxides the results shown two peaks, that were associated to interstitial oxygen mobility and to orthorhombic to monoclinic phase transition. For Sm based superconducting oxides the results shown a relaxation peak that was attributed to the jumps of the oxygen atoms in the inter-chains O1 and 05 of the lattice.581-586engBSCCO anelastic spectroscopyCupratesOxygen mobilitySBCOConcentration (process)Heat treatmentPhase transitionsRelaxation processesSpectroscopic analysisThermal effectsSuperconducting materialsTrabalho apresentado em evento10.4028/www.scientific.net/MSF.498-499.581WOS:000233984500095Acesso aberto2-s2.0-35248838310294998386741833885068675952794270000-0002-3336-309X