Zener relaxation in manganites?
We conducted internal friction (IF) and elastic modulus measurements on several manganites in the temperature range 100-500 K. The La1-xCaxMnO3 series, with x=0, 0.1, 0.2, 0.33 and 1, was studied showing the magnetic phase transitions and two additional IF peaks around 320 and 400 K, respectively. B...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2006 |
| País: | Argentina |
| Institución: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repositorio: | CONICET Digital (CONICET) |
| Idioma: | inglés |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/68855 |
| Acceso en línea: | http://hdl.handle.net/11336/68855 |
| Access Level: | acceso abierto |
| Palabra clave: | Internal Friction Manganites Zener Relaxation https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
| Sumario: | We conducted internal friction (IF) and elastic modulus measurements on several manganites in the temperature range 100-500 K. The La1-xCaxMnO3 series, with x=0, 0.1, 0.2, 0.33 and 1, was studied showing the magnetic phase transitions and two additional IF peaks around 320 and 400 K, respectively. Both, peaks associated to relaxations, present activation enthalpies of 2-3 and 3-6 eV, whose intensity depends on x. In this work we associate the 400 K IF peak to a Zener relaxation of the cations that occupied the same crystallographic site. We believe that the 320 K IF peak is due to different crystalline states of the samples. |
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