Physical properties of Sr2FeIrO6 and Sr1.2La0.8FeIrO6 double perovskites obtained by a new synthesis route

Página do item simplificado
dc.creatorBufaiçal, Leandro Felix de Sousa
dc.creatorCoutrim, Leandro Tolentino
dc.creatorSantos, Tatiane Oliveira dos
dc.creatorTerashita, Hirotoshi
dc.creatorJesus, Camilo Bruno Ramos de
dc.creatorPagliuso, Pascoal Jose Giglio 
dc.creatorBittar, Eduardo Matzenbacher
dc.date.accessioned2024-02-20T15:10:20Z
dc.date.available2024-02-20T15:10:20Z
dc.date.issued2016
dc.description.abstractPrevious works on Sr2-xLaxFeIrO6 double perovskite (DP) series reported a possible ferromagnetic transition at T ~ 700 K for the x ¼ 0.8 concentration, for which was observed the presence of spurious Fe2O3 phase. In order to prevent the formation of this impurity phase and check if this high temperature magnetic transition is intrinsic of the material, different synthesis routes became necessary. In this work, polycrystalline samples of Sr2-xLaxFeIrO6 (x ¼ 0.0 and 0.8) have been synthesized by solid state reaction using a new heating treatment. The sample's properties were investigated by synchrotron x-ray powder diffraction (SXRD), transmission electron microscopy (TEM), magnetic susceptibility, specific heat and electrical resistivity, and compared with the previously reported results. The SXRD data revealed a structural transition induced by La to Sr substitution (I2/m4P21/n). Moreover, it was not detected the presence of Fe2O3 on the samples obtained by the new route, which might be related to the absence of high temperature magnetic ordering. The magnetometry results indicated the emergence of Ir4þ with La doping, being corroborated by specific heat measurements which suggest Fe3þ/Ir5þ and Fe3þ/Ir4þ configurations for x ¼ 0.0 and 0.8 compounds, respectively. Temperature dependent electrical resistivity measurements showed that Sr2þ to La3þ substitution leads to a decrease of electrical resistivity, possibly associated with the increase in the number of Ir valence electrons.
dc.identifier.citationBUFAIÇAL, Leandro et al. Physical properties of Sr2FeIrO6 and Sr1.2La0.8FeIrO6 double perovskites obtained by a new synthesis route. Materials Chemistry and Physics, Amsterdam, v. 182, p. 459-465, 2016. DOI: 10.1016/j.matchemphys.2016.07.057. Disponível em: https://www.sciencedirect.com/science/article/pii/S0254058416305776. Acesso em: 16 fev. 2024.
dc.identifier.doi10.1016/j.matchemphys.2016.07.057
dc.identifier.issn0254-0584
dc.identifier.issne- 1879-3312
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S0254058416305776
dc.language.isoeng
dc.publisher.countryHolanda
dc.publisher.departmentInstituto de Física - IF (RMG)
dc.rightsAcesso Restrito
dc.subjectMagnetic materials
dc.subjectHeat treatment
dc.subjectCrystal structure
dc.subjectMagnetic properties
dc.subjectElectrical properties
dc.subjectSpecific heat
dc.titlePhysical properties of Sr2FeIrO6 and Sr1.2La0.8FeIrO6 double perovskites obtained by a new synthesis route
dc.typeArtigo

Arquivos

Licença do Pacote
Agora exibindo 1 - 1 de 1
Nenhuma Miniatura disponível
Nome:
license.txt
Tamanho:
1.71 KB
Formato:
Item-specific license agreed upon to submission
Descrição:
Baixar

Coleções

IF - Artigos publicados em periódicos