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Topochemical nitridation of Sr2FeMoO6.
- Source :
-
Chemical Communications . 3/14/2019, Vol. 55 Issue 21, p3105-3108. 4p. - Publication Year :
- 2019
-
Abstract
- The topotactic nitridation of cation ordered, tetragonal Sr2FeMoO6 in NH3 at moderate temperatures leads to cubic, Fm3̅m double perovskite oxynitride Sr2FeMoO4.9N1.1 where double-exchange interactions determine ferromagnetic order with TC≈ 100 K. Substitution of oxide by nitride induces bond asymmetries and local electronically driven structural distortions, which combined with Fermi level lowering restricts charge itinerancy to confined regions and preclude spontaneous long-range magnetic order. Under a magnetic field, ferromagnetic correlations expand, favoring charge delocalization and a negative magnetoresistance is observed. [ABSTRACT FROM AUTHOR]
- Subjects :
- *TOPOCHEMICAL reactions
*IRON compounds
*NITRIDATION
Subjects
Details
- Language :
- English
- ISSN :
- 13597345
- Volume :
- 55
- Issue :
- 21
- Database :
- Academic Search Index
- Journal :
- Chemical Communications
- Publication Type :
- Academic Journal
- Accession number :
- 135141316
- Full Text :
- https://doi.org/10.1039/c8cc09845j