The structure and magnetic properties of new iridium(IV) perovskites Sr(2)LnIrO(6) (Ln = Ce, Tb)

Authors
Harada, D Wakeshima, M Hinatsu, Y
Citation
D. Harada et al., The structure and magnetic properties of new iridium(IV) perovskites Sr(2)LnIrO(6) (Ln = Ce, Tb), J SOL ST CH, 145(1), 1999, pp. 356-360
Citations number
8
Categorie Soggetti
Inorganic & Nuclear Chemistry
Journal title
JOURNAL OF SOLID STATE CHEMISTRY
ISSN journal
00224596 → ACNP
Volume
145
Issue
1
Year of publication
1999
Pages
356 - 360
Database
ISI
SICI code
0022-4596(199906)145:1<356:TSAMPO>2.0.ZU;2-0
Abstract
New compounds with the formula Sr(2)LnIrO(6) (Ln = Ce, Sm similar to Lu) we re characterized from X-ray diffraction measurements and magnetic susceptib ility measurements in the temperatures between 5 and 300 K. They were deter mined to have ordered monoclinic perovskite structures with space group P2( 1)/n. The oxidation state of iridium is considered to be pentavalent for Sr (2)LnIrO(6) (Ln = Sm similar to Gd, Dy similar to Lu), whereas it is tetrav alent for Sr(2)LnIrO(6) (Ln = Ce, Tb). The compounds in which the iridium i s in the tetravalent state show an antiferromagnetic transition. Sr2CeIrO6 has a transition temperature at 21 K, and Sr2TbIrO6 has two transition temp eratures at 25 and 51 K. (C) 1999 Academic Press.