Comment on "Magnetoresistance and phase composition of La-Sn-Mn-O systems"
In a published paper by Li et al. [Phys. Rev. B 60, 10284 (1999)] the transport properties and phase composition of the manganites La1-xSnxMnO3+δ (x=0.1-0.5) are studied. The authors analyze their results assuming the existence of two phases: a perovskite LaMnO3+δ and a pyrochlore (La0.5Sn0.5)2Mn2O7...
| Autores: | ; ; ; ; ; |
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| Tipo de documento: | Artículo |
| Estado: | Published version |
| Fecha de publicación: | 2000 |
| País: | Argentina |
| Institución: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repositorio: | CONICET Digital (CONICET) |
| Lenguaje: | Inglés |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/68583 |
| Acceso en línea: | http://hdl.handle.net/11336/68583 |
| Nivel de acceso: | Acceso abierto |
| Palabra clave: | Magnetoresistance Manganites La-Sn-Mn-O System https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
| Sumario: | In a published paper by Li et al. [Phys. Rev. B 60, 10284 (1999)] the transport properties and phase composition of the manganites La1-xSnxMnO3+δ (x=0.1-0.5) are studied. The authors analyze their results assuming the existence of two phases: a perovskite LaMnO3+δ and a pyrochlore (La0.5Sn0.5)2Mn2O7. We consider that they misinterpret the x-ray diffraction data and we conclude that the manganites La1-xSnxMnO3+δ are in fact a multiphase material composed by LaMnO3+δ, La2Sn2O7, Mn3O4, and SnO2. The magnetic transition observed by Mössbauer experiments around 65 K attributed by Li et al. to that of the (La0.5Sn0.5)2Mn2O7 pyrochlore phase would correspond to that of the paramagnetic-ferrimagnetic one of Fe-doped Mn3O4. |
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