English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/52661
COMPARTIR / IMPACTO:
Estadísticas
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:
Título

Electron doping versus antisite defects: Structural and magnetic properties of Sr2−xLaxCrMoO6 and Sr2−xLaxCr1+x/2Mo1−x/2O6 perovskites

AutorBlasco, Javier; Ritter, C.; Rodríguez-Velamazán, J. A.; Herrero Martín, Javier
Fecha de publicación2010
EditorElsevier
CitaciónSolid State Sciences 12: 750-758 (2010)
ResumenThis study reports the synthesis, structure and magneticproperties of Sr2−xLaxCrMoO6 and Sr2−xLaxCr1+x/2Mo1−x/2O6 samples. Although both series exhibit similar crystal structures, Sr2−xLaxCrMoO6 samples present an effective electrondoping revealed by a significant expansion of the unit cell with increasing x. In Sr2−xLaxCr1+x/2Mo1−x/2O6 samples instead, the Cr-excess leads to a non electron doped system. Both series show a large amount of antisite defects whose number increases as La-content increases. Neutron diffraction patterns reveal the existence of long-range magnetic ordering for all samples but the magnetic peaks are very broad for Sr2CrMoO6 indicating a short coherence length of the magnetic ordering. This coherence length is increased upon replacing Sr by La. In both systems there is a clear increase of the magnetic transition temperature with increasing the La-content. The samples show ferromagnetic contributions at low temperature as deduced from the magnetic hysteresis loops typical of hard ferromagnetic materials. However, magnetic saturation is not achieved even at 5 T and the magnetic moment at this field is small. The ac magnetic susceptibility reveals the existence of several anomalies suggesting that these compounds are magnetically inhomogeneous. This is probably due to the presence of the large amount of structural defects not homogenously distributed.
URIhttp://hdl.handle.net/10261/52661
DOI10.1016/j.solidstatesciences.2010.02.025
Identificadoresdoi: 10.1016/j.solidstatesciences.2010.02.025
issn: 1293-2558
Aparece en las colecciones: (ICMA) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
Electron-doping.pdf325,24 kBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo
 

Artículos relacionados:


NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.