UniSa - IRIS Institutional Research Information System
IRIS è la soluzione IT che facilita la raccolta e la gestione dei dati relativi alle attività e ai prodotti della ricerca. Fornisce a ricercatori, amministratori e valutatori gli strumenti per monitorare i risultati della ricerca, aumentarne la visibilità e allocare in modo efficace le risorse disponibili.
EnglishIn perovskite oxide materials, because of the insertion of multiple valence states ions (e.g., Mn in manganites) at atomic A-site (i.e., at the center of perovskite cubic cell), an enhancement of the ferromagnetic metallic state together with a strong orbital order of Mn-ions is established. Such a feature goes beyond the conventional theoretical framework for which the kinetic energy of the free charge carriers prevents the occurrence of a long-range orbital order. We do provide a complete physical characterization of these so-called A-site manganites by comparing transport and structural properties of La0.7Sr0.3MnO3 and LaMnO3 thin films with different excess Mn content and different oxygen content. A viable route to successfully grow such class of materials as a function of temperature and oxygen environment is provided. The observed multi-order phase coexistence opens unexplored perspectives toward the synthesis of new intrinsic multi-functional materials.
| Titolo: | Synthesis and properties of highly metallic orbital-ordered A-site manganites | |
| Autori: | ||
| Data di pubblicazione: | 2013 | |
| Rivista: | ||
| Abstract: | In perovskite oxide materials, because of the insertion of multiple valence states ions (e.g., Mn in manganites) at atomic A-site (i.e., at the center of perovskite cubic cell), an enhancement of the ferromagnetic metallic state together with a strong orbital order of Mn-ions is established. Such a feature goes beyond the conventional theoretical framework for which the kinetic energy of the free charge carriers prevents the occurrence of a long-range orbital order. We do provide a complete physical characterization of these so-called A-site manganites by comparing transport and structural properties of La0.7Sr0.3MnO3 and LaMnO3 thin films with different excess Mn content and different oxygen content. A viable route to successfully grow such class of materials as a function of temperature and oxygen environment is provided. The observed multi-order phase coexistence opens unexplored perspectives toward the synthesis of new intrinsic multi-functional materials. | |
| Handle: | http://hdl.handle.net/11386/4087253 | |
| Appare nelle tipologie: | 1.1.2 Articolo su rivista con ISSN |
File in questo prodotto:
http://hdl.handle.net/11386/4087253
Copyright © 2021