| Journal: | Revista mexicana de física |
| Database: | PERIÓDICA |
| System number: | 000384008 |
| ISSN: | 0035-001X |
| Authors: | Hernández, E1 Sagredo, V1 Delgado, G.E1 |
| Institutions: | 1Universidad de Los Andes, Facultad de Ciencias, Mérida. Venezuela |
| Year: | 2015 |
| Season: | May-Jun |
| Volumen: | 61 |
| Number: | 3 |
| Pages: | 170-181 |
| Country: | México |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Analítico, teórico |
| English abstract | LaMnO3 Nanoparticles systems were prepared by the sol-gel auto-combustion method, in order to analyze the structure and magnetic behavior presented by the compound prepared following a new alternative route of synthesis. Structural characterization, morphology and crystallite size was performed by X-ray diffraction (XRD), infrared spectroscopy (IR) and electron microscopy (TEM). The XRD study together with a Rietveld analysis showed that the LaMnO3 compound crystallized in a perovskite hexagonal structure. The IR spectra showed that the compound has tensile energy bands in the Mn-O-Mn bonds related with the octahedron MnO6; which are attributed to a characteristic vibration of the ABO3 perovskite. An estimated size and morphological analysis was carried out by applying the Scherrer's formula and using Transmission Electron Microscopy (TEM), revealing non-spherical shape and particle sizes between 13 nm and 18 nm. The magnetic measurements M(T) were performed by using zero-field-cooled (ZFC) and field-cooled (FC) protocols which revealed a positive Weiss temperature indicating the presence of ferromagnetic interactions with a Curie temperature, TC = 150 K |
| Disciplines: | Física y astronomía |
| Keyword: | Física de materia condensada, Sol-gel, Autocombustión, Temperatura de Curie, Magnetización, Manganitas, Ferromagnetismo, Perovskita |
| Keyword: | Physics and astronomy, Condensed matter physics, Sol-gel, Autocombustion, Curie temperature, Magnetization, Manganites, Nanoparticles, Ferromagnetism, Perovskite |
| Full text: | Texto completo (Ver PDF) |
