Artículo
Abstract:
We have measured the electrical resistance of micrometric to nanometric powders of the La5 /8-y Pry Ca3 /8 MnO3 (LPCMO with y=0.3) manganite for hydrostatic pressures up to 4 kbar. By applying different final thermal treatments to samples synthesized by a microwave assisted denitration process, we obtained two particular grain characteristic dimensions (40 nm and 1000 nm) which allowed us to analyze the grain size sensitivity of the electrical conduction properties of both the metal electrode interface with manganite (Pt/LPCMO) and the intrinsic intergranular interfaces formed by the LPCMO powder, conglomerate under the only effect of external pressure. We also analyzed the effects of pressure on the phase diagram of these powders. Our results indicate that different magnetic phases coexist at low temperatures and that the electrical transport properties are related to the intrinsic interfaces, as we observe evidences of a granular behavior and an electronic transport dominated by the Space Charge limited Current mechanism. © 2011 Elsevier B.V. All rights reserved.
Registro:
| Documento: | Artículo |
| Título: | Electrical transport properties of manganite powders under pressure |
| Autor: | Rodríguez, M.G.; Leyva, A.G.; Acha, C. |
| Filiación: | Laboratorio de Bajas Temperaturas, Departamento de Física, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina Gerencia de Investigación y Aplicaciones, CAC, Comisión Nacional de Energía Atómica, Gral Paz 1499, 1650 San Martín, Buenos Aires, Argentina |
| Palabras clave: | Electronic transport; Manganites; Nanoparticles; Pressure effects; Electrical conduction; Electrical resistances; Electrical transport properties; Electronic transport; External pressures; Grain characteristics; Grain size; Intergranular interfaces; Low temperatures; Magnetic phasis; Metal electrodes; Microwave assisted; Nanometric powder; Space charge limited currents; Hydrostatic pressure; Manganese oxide; Manganites; Nanoparticles; Phase diagrams; Powder metals; Pressure effects; Transport properties; Electric properties |
| Año: | 2012 |
| Volumen: | 407 |
| Número: | 16 |
| Página de inicio: | 3137 |
| Página de fin: | 3140 |
| DOI: | http://dx.doi.org/10.1016/j.physb.2011.12.046 |
| Título revista: | Physica B: Condensed Matter |
| Título revista abreviado: | Phys B Condens Matter |
| ISSN: | 09214526 |
| CODEN: | PHYBE |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09214526_v407_n16_p3137_Rodriguez |
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Citas:
---------- APA ----------
Rodríguez, M.G., Leyva, A.G. & Acha, C. (2012) . Electrical transport properties of manganite powders under pressure. Physica B: Condensed Matter, 407(16), 3137-3140.http://dx.doi.org/10.1016/j.physb.2011.12.046
---------- CHICAGO ----------
Rodríguez, M.G., Leyva, A.G., Acha, C. "Electrical transport properties of manganite powders under pressure" . Physica B: Condensed Matter 407, no. 16 (2012) : 3137-3140.http://dx.doi.org/10.1016/j.physb.2011.12.046
---------- MLA ----------
Rodríguez, M.G., Leyva, A.G., Acha, C. "Electrical transport properties of manganite powders under pressure" . Physica B: Condensed Matter, vol. 407, no. 16, 2012, pp. 3137-3140.http://dx.doi.org/10.1016/j.physb.2011.12.046
---------- VANCOUVER ----------
Rodríguez, M.G., Leyva, A.G., Acha, C. Electrical transport properties of manganite powders under pressure. Phys B Condens Matter. 2012;407(16):3137-3140.http://dx.doi.org/10.1016/j.physb.2011.12.046
