| Revue: | Revista mexicana de física |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000426076 |
| ISSN: | 0035-001X |
| Autores: | Guzmán, E.J1 Estrada, F1 Aguilar, B1 Navarro, O1 Avignon, M5 |
| Instituciones: | 1Universidad Nacional Autónoma de México, Instituto de Investigaciones en Materiales, Morelia, Michoacán. México 2Universidad Michoacana de San Nicolás de Hidalgo, Facultad de Ciencias Físico-Matemáticas, Morelia, Michoacán. México 3Universidad Michoacana de San Nicolás de Hidalgo, Facultad de Biología, Morelia, Michoacán. México 4Universidad Nacional Autónoma de México, Instituto de Geofísica, Morelia, Michoacán. México 5Universite Grenoble Alpes, Grenoble, Isere. Francia |
| Año: | 2018 |
| Periodo: | Mar-Abr |
| Volumen: | 64 |
| Número: | 2 |
| País: | México |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Analítico, teórico |
| Resumen en inglés | The double perovskite compound Sr2FeMoO6 has a half-metallic ferromagnetic character and a high Curie temperature (420 K). Fe-Mo usually present some degree of disorder in either Fe or Mo ions, it is therefore fundamental to understand the role of electronic and structural parameters controlling the half-metallic character together with a Curie temperature as high as possible. We replaced divalent Sr2+ by trivalent La3+ ions in Sr2FeMoO6 system to observe the Curie temperature behavior. We present an electronic approach using the Green’s functions and the renormalization perturbation expansion method, with localized Fe-spins and conduction Mo-electrons interacting with the local spins via a double-exchange-type mechanism. We also include the electronic correlations among the conduction electrons within a mean-field approximation. Our results show the density of states and the Curie temperature behavior when La concentration increases for the Sr 2−y La y FeMoO6 system |
| Disciplinas: | Física y astronomía |
| Palabras clave: | Física, Perovskitas dobles, Semimetalicidad, Temperatura de Curie |
| Keyword: | Physics, Double perovskites, Half-metallicity, Curie temperature |
| Texte intégral: | Texto completo (Ver HTML) Texto completo (Ver PDF) |
