Results 101 to 110 of about 1,033 (153)
Spin reversal in Gd(Me,Mn)O3 (Me = Co, Ni)
Partial substitution of the rare-earth by calcium at the cationic site of the ABO3 perovskites may show extraordinary effects of spin reversal due to a negative polarization between the rare-earth and the manganese networks, as it occurs in the solid ...
Gutiérrez, D. +4 more
doaj
Estudio de las propiedades estructurales y magnéticas de perovskitas complejas Bi(1-x)NdxFe0.7Mn0.3O3 [PDF]
En esta tesis se presenta la síntesis de perovskitas complejas Bi(1−x)N dxF e0,7Mn0,3O3 (0,00 ≤ x ≤ 0,50). Dos métodos de síntesis fueron usados para obtener los materiales: síntesis rápida de fase líquida (LPS) y reacción de estado sólido (SSR ...
Saavedra Mesa, Diana Elizabeth
core
La transición de fase I4/mcm→Pm3m en Sr0.5Ba0.5HfO3-δ
The effect of partial substitution of cations in AMO3 compounds have been studied because the physical properties and applications of these materials can be improved. In particular we are interested in the Sr1-xBaxHfO3 family.
Lamas, D. +4 more
doaj
Magnetic properties of Aurivillius lanthanide-bismuth (LnFeO3)nBi4Ti3O12 (n = 1,2) layered titanates
Bismuth titanates of Aurivillius layer-structure (BiFeO3)nBi4Ti3O12, are of great technological interest because of their applications as non-volatile ferroelectric memories and high-temperature piezoelectric materials. The synthesis and crystallographic
Tartaj, J. +4 more
doaj
Desarrollo de catalizadores anódicos basados en perovskitas para celdas de combustible de óxido sólido [PDF]
Las pilas de combustible de óxido sólido (SOFCs) se presentan como una alternativa prometedora para generar energía con elevada eficiencia y bajas emisiones de gases, entre otras ventajas, dentro de las que también se destaca la flexibilidad operativa ...
Pompeo, Francisco +2 more
core
The structural properties of solid solutions based on EuMnO3, in which Eu has been substituted by divalent Ca2+ and Mn by the divalent cation Ni2+ or the variable valence cation Co2+-Co3+ have been studied by X-ray diffraction (XRD) and X-ray absorption ...
Peña, O. +3 more
doaj
Spark plasma sintering of hydrothermally derived ultrafine Ca doped lanthanum chromite powders
Lanthanum chromite nano-particles, with a composition of La0.9Ca0.1CrO3 and La0.8Ca0.2CrO3, were produced by 1 h of hydrothermal reaction at 400 and 425°C respectively.
Rendón-Angeles, J. C. +6 more
doaj
Estudio catalítico sobre RSM empleando óxidos mixtos Perovskitas Sr0.7Mg0.3NixCo1-xO3, obtenidas vía combustión en solución, SCS [PDF]
In the present work, mixed oxides have been prepared, specifically of the perovskite type with formula ABX3 (A= Sr and Mg; B= Co and Ni; X= O) from solution combustion synthesis, SCS, using glycine as fuel and microwave radiation as a source of energy ...
Petit, Eliel +7 more
core +1 more source
The structural and electrical features of the manganites solid solutions (Er,Ca)MnO<sub>3</sub> and Eu(Co,Mn)O<sub>3</sub>, have been studied by X-ray diffraction and conductivity measurements. Powders were prepared by solid-state
Tartaj, J. +3 more
doaj
Sustitución de la posición A en la estructura Perovskita ABO3
El trabajo se propuso estudiar la influencia de la introducción del bismuto como dopante en la estructura de la Perovskita ABO3, a través de la comparación de los resultados con cerámicas similares dopadas con lantano y de la aplicación de nuevos procedimientos de análisis de densificación durante la sinterización.
María Dolores Durruthy Rodríguez +4 more
openaire +1 more source

