FMR evidence of strong uniaxial anisotropy in La1-xCaxMnO3
We report an electron spin resonance study on La1-xCaxMnO3 ceramic samples with x = 0.33 and 0.5. Below TC the absorption line-shape can be well described as a ferromagnetic resonance with randomly distributed uniaxial anisotropy. In both samples the line-shape is used to fit an average anisotropy v...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2012 |
| País: | Argentina |
| Institución: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repositorio: | CONICET Digital (CONICET) |
| Idioma: | inglés |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/218161 |
| Acceso en línea: | http://hdl.handle.net/11336/218161 |
| Access Level: | acceso abierto |
| Palabra clave: | FERROMAGNETIC RESONANCE MANGANITES MAGNETIC ANISOTROPY https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
| Sumario: | We report an electron spin resonance study on La1-xCaxMnO3 ceramic samples with x = 0.33 and 0.5. Below TC the absorption line-shape can be well described as a ferromagnetic resonance with randomly distributed uniaxial anisotropy. In both samples the line-shape is used to fit an average anisotropy value. The anisotropy changes from easy plane for x = 0.33 to easy axis for x = 0.5. The present results for x = 0.5 imply that the uniaxial anisotropy, obtained from the measurements at 100K, is larger than the one expected for shape-only contribution even considering the extreme case of nanowires. The origin and magnitude of this anisotropy are discussed. |
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