Results 51 to 60 of about 528 (114)

Síntesis, sinterización y propiedades eléctricas de soluciones sólidas YNixMn1-xO3 preparadas a partir de Precursores Poliméricos

open access: yesBoletín de la Sociedad Española de Cerámica y Vidrio, 2001
The solid solutions YNixMn1-xO3 are semiconducting materials which show perovskite-like structure, ortorrombic symmetry, and spatial group Pbnm. Their electrical and magnetic properties are typical of materials with potential applications in sensor ...
Moure, C.   +3 more
doaj  

Eletrodo, eletrólito, célula a combustível óxido sólido e processo de produção de energia [PDF]

open access: yes, 2016
Universidade Federal do Rio Grande do ...
Jurado Egea, José Ramón   +2 more
core  

INFLUENCE OF BALL MILLING PROCESS ON STRUCTURAL AND MAGNETIC PROPERTIES OF La0.7Sr0.3MnO3 MANGANITE

open access: yesRevista EIA
This investigation presents the magnetic and structural properties of ferromagnetic manganite La0.7Sr0.3MnO3, (LSMO), subjected to ball milling processes. The LSMO powder sample was obtained by solid state reaction from high purity precursors. From X-ray
Gloria Campillo Figueroa   +6 more
doaj  

Efecto de los parámetros de procesamiento sobre las características cristalinas de la solución sólida Y(CoxMn1-x)O3, x=0.6, 0.7

open access: yesBoletín de la Sociedad Española de Cerámica y Vidrio, 2002
The preparation and crystalline features of perovskite solid solution Y(CoxMn1-x)O3, x=0.6, 0.7, belonging to the Co-rich region of the pseudobinary system YMnO3-YCoO3 have been studied. Dilatometric essays performed under different atmospheres have been
Fernández, J. F.   +3 more
doaj  

Efeito da dimensão do site-A na sequência de fases do sistema Eu1-x Lux MnO3 [PDF]

open access: yes, 2010
Dissertação de mestrado em Física dos Materiais Avançados (área de especialização em Materiais Funcionais para a Nano e Microtecnologia)Nesta dissertação apresentamos um estudo experimental do efeito do tamanho do ião do site-A na sequência de fases da ...
Oliveira, Juliana Alice Ferreira
core  

Phase transitions induced on hexagonal manganites by the incorporation of aliovalent cations on A or B lattice sites

open access: yesBoletín de la Sociedad Española de Cerámica y Vidrio, 1999
The phase transition to perovskite-type structure, that occurs in some hexagonal manganites when foreign cations are incorporated into solid solution, has been studied. Several solid solution series belonging to the Y(Mn, Ni)O3, (Er, Ca)MnO3, (Y, Ca)MnO3,
Moure, C.   +5 more
doaj  

Avaliação da dinâmica de portadores de carga em cerâmica multiferróicas por meio de espectroscopia dialétrica [PDF]

open access: yes, 2015
In this work, temperature-dependent and frequency-dependent dielectric investigations have been performed in TbMnO3 ceramics processed in either oxygen or argon atmospheres The dieletric constant of both samples exhibited three anomalies in the ...
Silveira, Luiz Gustavo Davanse da
core  

Crystalline behaviour and electrical properties of manganese perovskites substituted on A or B sites: ErMnO<sub>3</sub> modified by Ca and EuMnO<sub>3</sub> modified by Co

open access: yesBoletín de la Sociedad Española de Cerámica y Vidrio, 2010
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  

MAGNETORRESISTENCIA COLOSAL EN MANGANITAS DEL TIPO La1_xDxMnO3 CON D= Ba, Ca

open access: yesRevista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales
Se prepararon manganitas perovskitas del tipo La₀.₆₇Ca₀.₃₃MnO₃ y La₀.₆₇Ba₀.₃₃MnO₃ por reacción de estado sólido. Estas muestras se caracterizaron eléctrica, magnética y estructuralmente y se estudió el efecto que diferentes rutinas de preparación tienen sobre estas propiedades.
R. Jiménez, A. Mariño, H. Sánchez
openaire   +1 more source

Simulación Monte Carlo de propiedades magnéticas y de transporte en sistemas de superredes del tipo (FM/AFM)n [PDF]

open access: yes, 2010
En este documento de tesis doctoral se presentan los resultados de simulaciones computacionales empleando el método Monte Carlo y el modelo de Heisenberg clásico, para el estudio de propiedades magnéticas y de transporte de manganitas de tipo perovskita.
Restrepo Parra, Elisabeth
core   +1 more source

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