ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Many researchers became interested in the discovery of Bi2Sr2CaCu2O8+δ oxides withcritical temperature of around 80 K. It is known that the critical temperature is related to the CuO2planes of the material. For this reason, the study of the interstitial oxygen in these oxides is of greatrelevance. The samples were prepared by means of conventional solid state reactions, through thestoichiometric mixture of precursory powders. After the sinterization, the samples were submittedto measurements of density, electrical resistivity, x-ray diffraction, scanning electron microscopyand energy dispersion spectroscopy, with the objective of performing their characterization. Themeasurements of mechanical spectroscopy were performed by a torsion pendulum. The resultsshow three relaxation processes in the temperature range of 200 and 700 K, with activation energyof approximately 0.9 eV, which has been attributed to the dynamics of the interstitial oxygenpresent in the material
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/19/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.591-593.634.pdf
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