Results 51 to 60 of about 541 (112)

MAGNETORESISTANCE IN MANGANITE-BASED JUNCTIONS

open access: yesMomento, 2010
This paper reviews the tunnelling magnetoresistance (TMR) of magnetic tunneling junctions, particulary of those made of manganites. The origin of this type of tunneling and its dependence on the material, the growing method and the temperature are ...
Lucero Alvarez-Miño
doaj  

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  

Estabilidad térmica de manganitas tipo La1-xCaxMnO3 obtenidas mediante mecanosíntesis

open access: yes, 2009
Manganitas de Lantano, Mecanosíntesis, Estabilidad Térmica, Estructura Cristalina, Energía de Activación.
I. A. Lira Hernández   +3 more
openaire   +3 more sources

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  

Preparación y caracterización de perovskitas decobaltoy manganeso por los métodoscitrato y atomización pirolítica (spray pyrolysis) [PDF]

open access: yes, 2014
En este trabajo se prepararon óxidos mixtos con estructura perovskita, con fórmulas La1-xTRxMe1-yNiy (TR = Ce, Pr, Nd, Gd, Sm y Er; M = Co, Mn) por los métodos de citrato amorfo y atomización pirolítica (spray pyrolysis).
Moreno Aldana, Luis Carlos
core   +1 more source

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

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  

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  

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