Publication
Title
Synthesis and structural mechanisms of the 2201-type ferrites and polytypes: $Fe_{2}(Sr_{2-x}A_{x})FeO_{6.5-\delta/2}$ (A = Ba, La, Tl, Pb and Bi)
Author
Abstract
 The Fe2(Sr2 − xAx)FeO6.5 − ä/2 systems have been investigated, by doping the iron rich 2201-type parent structure with Ba2+, La3+ and 5d10 post-transition cations. The syntheses have been carried out up to the limit of the 2201-type solid solutions, in order to test the role of the double iron layer Fe2O2.5 − ä/2. The localisation of the charge carriers in these compounds is consistent with their strong antiferro-magnetism. The investigation was then carried out in the transition part of the diagram up to the formation of stable phases. The study of structural mechanisms was carried using high resolution electron microscopy (transmission and scanning transmission), electron diffraction and energy dispersive spectroscopy. Different non-stoichiometry mechanisms are observed, depending on the electronic structure and chemical properties of the doping elements. The specific behavior of the modulated double iron layer is discussed.
Language
English
Source (journal)
Solid state sciences. - Amsterdam
Publication
Amsterdam : 2009
ISSN
1293-2558
Volume/pages
11:3(2009), p. 595-607
ISI
000264644800001
Full text (Publisher's DOI)
UAntwerpen
 Faculty/Department Research group Publication type Subject Affiliation Publications with a UAntwerp address