Abstract:
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.
Registro:
Documento: |
Artículo
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Título: | Low temperature irreversibility induced by thermal cycles on two prototypical phase separated manganites |
Autor: | Sacanell, J.; Quintero, M.; Curiale, J.; Garbarino, G.; Acha, C.; Freitas, R.S.; Ghivelder, L.; Polla, G.; Leyva, G.; Levy, P.; Parisi, F.; Matutes Aquino J.A.; Mendoza Suarez G.; Valenzuela Monjar R. |
Ciudad: | Chihuahua |
Filiación: | Departamento de Física, CAC, CNEA, Av. Gral Paz 1499 (1650), San Martín, Buenos Aires, Argentina Laboratorio de Bajas Temperaturas, Departamento de Física, UBA, Argentina Laboratorio de Baixas Temperaturas, Instituto de Fisica, UFRJ, Rio de Janeiro, Brazil
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Palabras clave: | 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 |
Año: | 2004
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Volumen: | 369
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Número: | 1-2
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Página de inicio: | 74
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Página de fin: | 77
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DOI: |
http://dx.doi.org/10.1016/j.jallcom.2003.09.045 |
Título revista: | Proceedings of the VI Latin American Workshop on Magnetism
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Título revista abreviado: | J Alloys Compd
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ISSN: | 09258388
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CODEN: | JALCE
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Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09258388_v369_n1-2_p74_Sacanell |
Referencias:
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Citas:
---------- APA ----------
Sacanell, J., Quintero, M., Curiale, J., Garbarino, G., Acha, C., Freitas, R.S., Ghivelder, L.,..., Valenzuela Monjar R.
(2004)
. Low temperature irreversibility induced by thermal cycles on two prototypical phase separated manganites. Proceedings of the VI Latin American Workshop on Magnetism, 369(1-2), 74-77.
http://dx.doi.org/10.1016/j.jallcom.2003.09.045---------- CHICAGO ----------
Sacanell, J., Quintero, M., Curiale, J., Garbarino, G., Acha, C., Freitas, R.S., et al.
"Low temperature irreversibility induced by thermal cycles on two prototypical phase separated manganites"
. Proceedings of the VI Latin American Workshop on Magnetism 369, no. 1-2
(2004) : 74-77.
http://dx.doi.org/10.1016/j.jallcom.2003.09.045---------- MLA ----------
Sacanell, J., Quintero, M., Curiale, J., Garbarino, G., Acha, C., Freitas, R.S., et al.
"Low temperature irreversibility induced by thermal cycles on two prototypical phase separated manganites"
. Proceedings of the VI Latin American Workshop on Magnetism, vol. 369, no. 1-2, 2004, pp. 74-77.
http://dx.doi.org/10.1016/j.jallcom.2003.09.045---------- VANCOUVER ----------
Sacanell, J., Quintero, M., Curiale, J., Garbarino, G., Acha, C., Freitas, R.S., et al. Low temperature irreversibility induced by thermal cycles on two prototypical phase separated manganites. J Alloys Compd. 2004;369(1-2):74-77.
http://dx.doi.org/10.1016/j.jallcom.2003.09.045