✦ LIBER ✦

Structural changes and oxygen stoichiometry in Pb2Sr2Y1−xCaxCu3O8+δ

✍ Scribed by J.J. Capponi; P. Bordet; C. Chaillout; J. Chenavas; O. Chmaissem; E.A. Hewat; J.L. Hodeau; W. Korczak; M. Marezio

Publisher: Elsevier Science
Year: 1989
Tongue: English
Weight: 247 KB
Volume: 162-164
Category: Article
ISSN: 0921-4534
DOI: 10.1016/0921-4534(89)90913-1

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✦ Synopsis

We have prepared several samples of Pb2Sr2Yl-xCaxCu308+O with various well defined oxygen contents and studied their oxidation process by TGA and characterized them by X-ray and electron diffraction. For x = 0 the upper limit for ~ is found to be 1.9. We show that the oxidation process is accompanied by a change in the unit cell resulting on one hand from the oxygen vacancies ordering and on the other from the ordering of the Pb2+ and Pb4+ cations.

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