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...

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Autores principales: Rodríguez, M.G., Leyva, A.G., Acha, C.
Formato: JOUR
Materias:
Electronic transport
Manganites
Nanoparticles
Pressure effects
Electrical conduction
Electrical resistances
Electrical transport properties
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
Phase diagrams
Powder metals
Transport properties
Electric properties
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_09214526_v407_n16_p3137_Rodriguez
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_09214526_v407_n16_p3137_Rodriguez2023-10-03T15:45:25Z Electrical transport properties of manganite powders under pressure Rodríguez, M.G. Leyva, A.G. Acha, C. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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
Rodríguez, M.G.
Leyva, A.G.
Acha, C.
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.
format JOUR
author Rodríguez, M.G.
Leyva, A.G.
Acha, C.
author_facet Rodríguez, M.G.
Leyva, A.G.
Acha, C.
author_sort Rodríguez, M.G.
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
url http://hdl.handle.net/20.500.12110/paper_09214526_v407_n16_p3137_Rodriguez
work_keys_str_mv AT rodriguezmg electricaltransportpropertiesofmanganitepowdersunderpressure
AT leyvaag electricaltransportpropertiesofmanganitepowdersunderpressure
AT achac electricaltransportpropertiesofmanganitepowdersunderpressure
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