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Studies of systems related to high-Tc superconductors by electron microscopy and X-ray powder diffraction
Stockholm University, Faculty of Science, Department of Physical, Inorganic and Structural Chemistry, Inorganic Chemistry.
1992 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

New cuprate systems related to high temperature superconductors have been investigated and are reviewed. The synthesized samples have been studied mainly by transmission electron microscopy, energy-dispersive spectrometry and X-ray powder diffraction, in order to determine composition and structure of the formed phases.

The following compounds were studied: Bi14Cu10Nb16O7 and Bit 7Cuo.2Ti2.006.8, both of cubic pyrochlore-type structure; BiNbs.4015, a tetragonal tungsten bronze type compound; Bi2/3Cu3Ti4012, a perovskite-related phase; Ba4CuYW2012, with a perovskite based unit cell; LaSrCuGaOs and LaCaCuGaOs, both of brownmillerite type and some related phases obtained by aliovalent substitution; R2Hg04 (R = La, Nd, Sm, Eu and Gd), with a new type of structure; and HgBa^RCugOy (R = La, Nd, Eu, Eu+Ca, Gd, Dy and Y), new "Hg-1212" type phases with a structure related to that of the thallium superconductor TlBa2CaCu207.

The structural features of these compounds of relevance to superconductivity are also discussed.

Place, publisher, year, edition, pages
Stockholm: Stockholm University, 1992. , p. 66
Series
Chemical communications, ISSN 0366-5607 ; 1993:1
National Category
Inorganic Chemistry
Identifiers
URN: urn:nbn:se:su:diva-153394ISBN: 91-7153-081-9 (print)OAI: oai:DiVA.org:su-153394DiVA, id: diva2:1186087
Note

Härtill 8 uppsatser

Available from: 2018-02-27 Created: 2018-02-27 Last updated: 2018-02-27Bibliographically approved

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