Low temperature irreversibility induced by thermal cycles on two prototypical phase separated manganites
We have studied the effect of irreversibility induced by repeated thermal cycles on the electric transport and magnetization of polycrystalline samples of La0.5Ca0.5MnO3 and La0.325Pr 0.3Ca0.375MnO3. An increase of the resistivity and a decrease of the magnetization at different temperature ranges a...
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2004
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09258388_v369_n1-2_p74_Sacanell http://hdl.handle.net/20.500.12110/paper_09258388_v369_n1-2_p74_Sacanell |
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paper:paper_09258388_v369_n1-2_p74_Sacanell2023-06-08T15:51:27Z Low temperature irreversibility induced by thermal cycles on two prototypical phase separated manganites Irreversibility Manganites Phase separation Approximation theory Graph theory Ground state Hydrostatic pressure Magnetization Microstructure Phase separation Phase transitions Polycrystalline materials Sampling Thermal cycling Irreversibility Manganites Manganese compounds We have studied the effect of irreversibility induced by repeated thermal cycles on the electric transport and magnetization of polycrystalline samples of La0.5Ca0.5MnO3 and La0.325Pr 0.3Ca0.375MnO3. An increase of the resistivity and a decrease of the magnetization at different temperature ranges after cycling is obtained in the temperature range between 300 and 30K. Both compounds are known to exhibit intrinsic submicrometric coexistence of phases and undergo a sequence of phase transitions related to structural changes. Changes induced by thermal cycling can be partially inhibited by applying magnetic field and hydrostatic pressure. Our results suggest that the growth and coexistence of phases with different structures gives rise to microstructural tracks and strain accommodation, producing the observed irreversibility. Irrespective of the actual ground state of each compound, the effect of thermal cycling is towards an increase of the amount of the insulating phase in both compounds. © 2003 Elsevier B.V. All rights reserved. 2004 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09258388_v369_n1-2_p74_Sacanell http://hdl.handle.net/20.500.12110/paper_09258388_v369_n1-2_p74_Sacanell |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Irreversibility Manganites Phase separation Approximation theory Graph theory Ground state Hydrostatic pressure Magnetization Microstructure Phase separation Phase transitions Polycrystalline materials Sampling Thermal cycling Irreversibility Manganites Manganese compounds |
| spellingShingle |
Irreversibility Manganites Phase separation Approximation theory Graph theory Ground state Hydrostatic pressure Magnetization Microstructure Phase separation Phase transitions Polycrystalline materials Sampling Thermal cycling Irreversibility Manganites Manganese compounds Low temperature irreversibility induced by thermal cycles on two prototypical phase separated manganites |
| topic_facet |
Irreversibility Manganites Phase separation Approximation theory Graph theory Ground state Hydrostatic pressure Magnetization Microstructure Phase separation Phase transitions Polycrystalline materials Sampling Thermal cycling Irreversibility Manganites Manganese compounds |
| description |
We have studied the effect of irreversibility induced by repeated thermal cycles on the electric transport and magnetization of polycrystalline samples of La0.5Ca0.5MnO3 and La0.325Pr 0.3Ca0.375MnO3. An increase of the resistivity and a decrease of the magnetization at different temperature ranges after cycling is obtained in the temperature range between 300 and 30K. Both compounds are known to exhibit intrinsic submicrometric coexistence of phases and undergo a sequence of phase transitions related to structural changes. Changes induced by thermal cycling can be partially inhibited by applying magnetic field and hydrostatic pressure. Our results suggest that the growth and coexistence of phases with different structures gives rise to microstructural tracks and strain accommodation, producing the observed irreversibility. Irrespective of the actual ground state of each compound, the effect of thermal cycling is towards an increase of the amount of the insulating phase in both compounds. © 2003 Elsevier B.V. All rights reserved. |
| title |
Low temperature irreversibility induced by thermal cycles on two prototypical phase separated manganites |
| title_short |
Low temperature irreversibility induced by thermal cycles on two prototypical phase separated manganites |
| title_full |
Low temperature irreversibility induced by thermal cycles on two prototypical phase separated manganites |
| title_fullStr |
Low temperature irreversibility induced by thermal cycles on two prototypical phase separated manganites |
| title_full_unstemmed |
Low temperature irreversibility induced by thermal cycles on two prototypical phase separated manganites |
| title_sort |
low temperature irreversibility induced by thermal cycles on two prototypical phase separated manganites |
| publishDate |
2004 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09258388_v369_n1-2_p74_Sacanell http://hdl.handle.net/20.500.12110/paper_09258388_v369_n1-2_p74_Sacanell |
| _version_ |
1768545654412410880 |