Paper Title:
Effect of Thermal Treatment under Oxygen Atmosphere on the Superconducting Properties of RuSr2GdCu2O8
  Abstract

The discovery of the spatial uniform coexistence of superconductivity and ferromagnetism in rutheno-cuprates, RuSr2GdCu2O8 (Ru-1212), has spurred an extraordinary development in the study of the competition between magnetism and superconductivity. However, several points of their preparation process and characterization that determine their superconductive behavior are still obscure. The improvement of sample preparation conditions involves some thermal treatments in inert atmosphere. The first treatment results in the immediate formation of Sr2GdRuO6. Using the CuO composition as a precursor, we produced Ru-1212. To turn it metallic and superconductor, besides the previous treatment, a final sinterization is carried out in oxygen flow for several days. Three Ru-1212 samples were produced by varying the last sinterization time (two, four, and six days under oxygen flow). Through measurements of x-ray diffraction, scanning electron microscopy, differential thermal analysis, magnetic susceptibility and mechanical spectroscopy, it was studied the influence of the treatments under oxygen atmosphere on the structural and superconducting properties of the material.

  Info
Periodical
Materials Science Forum (Volumes 530-531)
Edited by
Lucio Salgado and Francisco Ambrozio Filho
Pages
550-556
DOI
10.4028/www.scientific.net/MSF.530-531.550
Citation
J. M. de Albuquerque Gimenez, C. R. Grandini, M.S. Góes, A.R. Jurelo, R. Dobrzanski , "Effect of Thermal Treatment under Oxygen Atmosphere on the Superconducting Properties of RuSr2GdCu2O8", Materials Science Forum, Vols. 530-531, pp. 550-556, 2006
Online since
November 2006
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