Electronic, crystal structure and morphological properties of the Sr2DyRuO6 double perovskite

Triana, Carlos A.; Téllez, D.A. Landı́nez; Rodríguez, J. Arbey; Fajardo, Francisco; Roa-Rojas, J.

doi:10.1016/j.matlet.2012.05.041

Cited by 29 publications

(12 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Las diferencias evidenciadas a nivel de los cationes principales se deben a que la muestra presenta un alto nivel de modificación en la posición A de la estructura tipo perovskita, valores que se ajustan perfectamente a los límites de detección de la técnica utilizada en función de la homogeneidad microestructural de ella [15]. La naturaleza de los valores obtenidos confirma el excelente control estequiomé-trico desarrollado a lo largo de todo el proceso de síntesis, permitiendo evitar interpretaciones equivocadas sobre la composición del material.…”

Section: Energía Dispersiva De Rayos X (Edx) Yunclassified

Síntesis y caracterización del sistema La0,8Sr0,2MnO3

Cruz-Pacheco

Cuaspud

2015

View full text Add to dashboard Cite

ResumenEste trabajo reporta la síntesis y la caracterización de un óxido tipo La 0,8 Sr 0,2 MnO 3 , usando una ruta de síntesis de química húmeda, con la cual fue obtenido un material cerámico con propiedades fisicoquímicas y características estructurales de gran importancia para aplicación como componente electródico para uso en pilas de combustible de óxido sólido (SOFC). El material sintetizado se caracterizó por difracción de rayos X (XRD), obteniéndose un material con estructura tipo perovskita. Los resultados derivados de microscopia electrónica de transmisión de alta resolución (HRTEM) confirmaron la obtención de sólidos de morfología regular orientados de forma preferente en el plano (1 1 2), con distancias interplanares d calculadas de 0,25 nm con base en los resultados de HRTEM y XRD. La composición del material La 0,8 Sr 0,2 MnO 3 fue determinada mediante microanálisis de rayos X por energía dispersiva (EDX), indicando una buena concordancia entre la composición propuesta y obtenida. Los valores de área superficial y volumen de poro medidos por el método BET permiten indicar que el material preserva sus características superficiales y texturales en función del método de síntesis utilizado.Palabras clave: Manganita, Perovskitas, SOFC. AbstractThis paper reports the synthesis and characterization of an oxide type La 0.8 Sr 0.2 MnO 3 , using a wet chemistry route, which allows to obtain a ceramic material with physicochemical properties and structural characteristics of relevant importance for application as an electrode component for use in solid oxide fuel cells devices (SOFC). The synthesized material was characterized by X-ray diffraction (XRD), obtaining a material with perovskite structure. Results from High-resolution transmission electron microscopy (HRTEM), confirm the synthesis of a solid with regular morphology preferentially oriented in the (1 1 2) plane, with d spacing calculated of about 0.25 nm based on the results of HRTEM and XRD. The La 0.8 Sr 0.2 MnO 3 composition was determined by X-ray microanalysis by energy dispersive (EDX), indicating a good agreement between the proposed and obtained composition. Surface area and pore volume measured by BET method would suggest that the material maintain their textural and surface characteristics depending on the synthesis method used.

show abstract

Section: Energía Dispersiva De Rayos X (Edx) Yunclassified

Síntesis y caracterización del sistema La0,8Sr0,2MnO3

Cruz-Pacheco

Cuaspud

2015

View full text Add to dashboard Cite

show abstract

“…However, it is not easy to find materials in which these properties coexist at room temperature. Perovskites are ceramic oxide materials, characterized by the ideal formula ABX 3 , where A is an alkali cation, rare earth or transition element, whose ionic radius is larger than that of the cation B, which can be a transition metal, and X is usually Oxygen [10]. The LaFeO 3 is a material that has been extensively studied and belongs to this family of ceramic oxides.…”

Section: Introductionmentioning

confidence: 99%

Structure, Ferromagnetic, Dielectric and Electronic Features of the $$\hbox {LaBiFe}_{2}\hbox {O}_{6}$$ LaBiFe 2 O 6 Material

et al. 2016

Self Cite

View full text Add to dashboard Cite

In this paper the synthesis and study of the structural, morphological, electrical, magnetic and electronic properties of the LaBiFe 2 O 6 novel material are reported. The material was produced using the standard ceramic method. The Rietveld analysis of experimental data of x-ray diffraction showed that it synthesizes in an orthorhombic perovskite structure (Pnma, #62 space group). Two types of grain, micro and submicrometric, with the LaBiFe 2 O 6 stoichiometry were identified by scanning electron microscopy and Xray dispersive spectroscopy. Results of electrical polarization and dielectric constant ferroelectric suggest the occurrence of response of the material at room temperature. A T=300 K the material is ferromagnetic and exhibits an anomaly at T=258 K, which is attributed to anisotropy effects, suggesting the occurrence of biferroic behaviour. Results of diffuse reflectance suggest a semiconductor behaviour with energy gap E g =2,17 eV, which is in agreement with calculations of band structure and density of states for one spin orientation, while for the other spin configuration calculations suggest a conductor feature.

show abstract

“…The large majority of such systems present a perovskite-type [3,4], are a broad class of compounds with general chemical formula 6 , where A site is occupied by divalent or trivalent cations (e.g. Ca, Ba, Sr, La, Bi etc) [5][6][7][8][9] and B' or B" octahedral sites are occupied by 3d and 4d/5d transitions metals cations or lanthanides with smaller ionic radii. The B'O 6 and B"O 6 octahedra are alternatively arranged in two interleaving fcc sublattices.…”

Section: Introductionmentioning

confidence: 99%