A phenomenological description of the pressure sensitivity of the Curie temperature in hole-doped manganites
We performed high-pressure experiments in La0.8Ca0.2-xSr xMnO3 (LCSMO)(0≤ x ≤ 0.2) ceramic samples in order to analyze the validity of the well-known relation between the A-cation mean ionic radius ((ra)) and the Curie temperature Tc of hole-doped manganites at a fixed doping level and for doping va...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_02955075_v88_n4_p_Garbarino |
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todo:paper_02955075_v88_n4_p_Garbarino2023-10-03T15:17:29Z A phenomenological description of the pressure sensitivity of the Curie temperature in hole-doped manganites Garbarino, G. Acha, C. We performed high-pressure experiments in La0.8Ca0.2-xSr xMnO3 (LCSMO)(0≤ x ≤ 0.2) ceramic samples in order to analyze the validity of the well-known relation between the A-cation mean ionic radius ((ra)) and the Curie temperature Tc of hole-doped manganites at a fixed doping level and for doping values below the 0.3 (Mn+4/Mn+3) ratio. By considering our results and collecting others from the literature, we were able to propose a phenomenological relation that considers the systematic dependence of T c with structural and electronic parameters. The proposed expression predicts fairly well the pressure sensitivity of Tc, its dependence with the A-cation radius disorder and its evolution in the high-pressure range. Considering a Double-Exchange model, modified by polaronic effects, the phenomenological law obtained for Tc can be associated with the product of two terms: the polaronic modified bandwidth and an effective hole doping. Copyright © EPLA, 2009. Fil:Garbarino, G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Acha, C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_02955075_v88_n4_p_Garbarino |
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Universidad de Buenos Aires |
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I-28 |
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R-134 |
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| description |
We performed high-pressure experiments in La0.8Ca0.2-xSr xMnO3 (LCSMO)(0≤ x ≤ 0.2) ceramic samples in order to analyze the validity of the well-known relation between the A-cation mean ionic radius ((ra)) and the Curie temperature Tc of hole-doped manganites at a fixed doping level and for doping values below the 0.3 (Mn+4/Mn+3) ratio. By considering our results and collecting others from the literature, we were able to propose a phenomenological relation that considers the systematic dependence of T c with structural and electronic parameters. The proposed expression predicts fairly well the pressure sensitivity of Tc, its dependence with the A-cation radius disorder and its evolution in the high-pressure range. Considering a Double-Exchange model, modified by polaronic effects, the phenomenological law obtained for Tc can be associated with the product of two terms: the polaronic modified bandwidth and an effective hole doping. Copyright © EPLA, 2009. |
| format |
JOUR |
| author |
Garbarino, G. Acha, C. |
| spellingShingle |
Garbarino, G. Acha, C. A phenomenological description of the pressure sensitivity of the Curie temperature in hole-doped manganites |
| author_facet |
Garbarino, G. Acha, C. |
| author_sort |
Garbarino, G. |
| title |
A phenomenological description of the pressure sensitivity of the Curie temperature in hole-doped manganites |
| title_short |
A phenomenological description of the pressure sensitivity of the Curie temperature in hole-doped manganites |
| title_full |
A phenomenological description of the pressure sensitivity of the Curie temperature in hole-doped manganites |
| title_fullStr |
A phenomenological description of the pressure sensitivity of the Curie temperature in hole-doped manganites |
| title_full_unstemmed |
A phenomenological description of the pressure sensitivity of the Curie temperature in hole-doped manganites |
| title_sort |
phenomenological description of the pressure sensitivity of the curie temperature in hole-doped manganites |
| url |
http://hdl.handle.net/20.500.12110/paper_02955075_v88_n4_p_Garbarino |
| work_keys_str_mv |
AT garbarinog aphenomenologicaldescriptionofthepressuresensitivityofthecurietemperatureinholedopedmanganites AT achac aphenomenologicaldescriptionofthepressuresensitivityofthecurietemperatureinholedopedmanganites AT garbarinog phenomenologicaldescriptionofthepressuresensitivityofthecurietemperatureinholedopedmanganites AT achac phenomenologicaldescriptionofthepressuresensitivityofthecurietemperatureinholedopedmanganites |
| _version_ |
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