Title
Ortho-II structure in <tex>$ABa_{2}Cu_{3}O_{7-\delta}$</tex> compounds (A=Er, Nd, Pr, Sm, Yb)Ortho-II structure in <tex>$ABa_{2}Cu_{3}O_{7-\delta}$</tex> compounds (A=Er, Nd, Pr, Sm, Yb)
Author
Faculty/Department
Faculty of Sciences. Physics
Research group
Electron microscopy for materials research (EMAT)
Publication type
article
Publication
Amsterdam,
Subject
Physics
Source (journal)
Physica: C: superconductivity. - Amsterdam
Volume/pages
196(1992):3-4, p. 363-368
ISSN
0921-4534
ISI
A1992JC73400021
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Oxygen ordering has been investigated in superconducting ABa2Cu3O7-delta ceramic materials with A = Er, Nd, Sm and Yb, as well as in samples of this type with the rate earth A partially substituted by Pr. The critical temperature T(c) was determined as a function of the oxygen deficiency-delta of the compound and the corresponding microstructures were investigated by electron diffraction and electron microscopy. A distinct relationship exists between the width of the 60 K plateau and the ortho II ordering. Our results show that the ortho II ordered phase is the superconducting phase with a characteristic T(c) of 60 K.
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