Electrical transport properties of manganite powders under pressure
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 o...
Guardado en:
| Publicado: |
2012
|
|---|---|
| Materias: | |
| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09214526_v407_n16_p3137_Rodriguez http://hdl.handle.net/20.500.12110/paper_09214526_v407_n16_p3137_Rodriguez |
| Aporte de: |
| id |
paper:paper_09214526_v407_n16_p3137_Rodriguez |
|---|---|
| record_format |
dspace |
| spelling |
paper:paper_09214526_v407_n16_p3137_Rodriguez2023-06-08T15:50:36Z Electrical transport properties of manganite powders under pressure 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 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. 2012 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09214526_v407_n16_p3137_Rodriguez http://hdl.handle.net/20.500.12110/paper_09214526_v407_n16_p3137_Rodriguez |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
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 |
| spellingShingle |
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 Electrical transport properties of manganite powders under pressure |
| topic_facet |
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 |
| description |
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. |
| title |
Electrical transport properties of manganite powders under pressure |
| title_short |
Electrical transport properties of manganite powders under pressure |
| title_full |
Electrical transport properties of manganite powders under pressure |
| title_fullStr |
Electrical transport properties of manganite powders under pressure |
| title_full_unstemmed |
Electrical transport properties of manganite powders under pressure |
| title_sort |
electrical transport properties of manganite powders under pressure |
| publishDate |
2012 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09214526_v407_n16_p3137_Rodriguez http://hdl.handle.net/20.500.12110/paper_09214526_v407_n16_p3137_Rodriguez |
| _version_ |
1768543998749704192 |