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2001
ACL
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D.Pelloquin, M.Allix, C.Michel, M.Hervieu, B.Raveau, 'Transmission electron microscopy for research of new layered oxides: study of the Bi-Sr-Fe-O system', Philos. Mag. B 81 1669 (2001) doi:10.1080/13642810110079926
The Bi-Sr-Fe-O system has been revisited by transmission electron microscopy techniques. Three new layered oxides have been isolated and characterized. The first two oxides, Bi0,82Sr2,92FeO6-d and Bi0,38Sr2,54Fe1,08O5-d, exhibit a 2201- and a 1201-type structure respectively, related to superconducting cuprates. Both oxides are characterized by mixed layers with a 1/1 ordering between Bi and Sr species. The transition from 2201 structure to 1201 structure occurs through a complex intergrowth mechanism and leads to an intermediate structure, formulated as Bi1,21Sr5,12Fe2O11-d. It corresponds to a regular stacking between the 1201 motif and the 2201 motif. These results are discussed in comparison with those previously obtained for the Bi-Sr-M-O systems (M = Cu, Mn or Co).
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