X-ray crystal structures of Al-doped (Y,Ca)Ba2Cu3O(7-y) whiskers.
Acta Crystallogr B Struct Sci Cryst Eng Mater
; 70(Pt 2): 236-42, 2014 Apr.
Article
em En
| MEDLINE
| ID: mdl-24675593
ABSTRACT
Al(+3)-doped (Y,Ca)Ba2Cu3O(7-y) (YBCO) whiskers have been synthesized using a solid-state reaction technique. These materials are promising candidates for solid-state THz applications based on sequences of Josephson Junctions (IJJs). Alumina addition was systematically varied and the effect of aluminium incorporation on the structure has been investigated using single-crystal X-ray diffraction. Aluminium only replaces Cu atoms in the O-Cu-O-Cu chains and a gradual transition from orthorhombic to tetragonal space group occurs, thus increasing the Al content. A gradual modification of the coordination sphere of the copper site has also been observed. The Ca(2+) ion substitutes mainly the Y(3+) ion and also, to a small extent, the Ba(2+) ion.
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01-internacional
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MEDLINE
Idioma:
En
Revista:
Acta Crystallogr B Struct Sci Cryst Eng Mater
Ano de publicação:
2014
Tipo de documento:
Article