Abstract
The coexistence of magnetic phases seems to be a characteristic of the La-Ca family of in colossal magnetoresistant manganites. We have analyzed this phenomenon in terms of a free energy, F, where magnetic and electronic contributions of two coexistent phases are included. Three order parameters describe the behavior of the mixed material: the magnetization of each phase and the metallic fraction. Due to the coupling between order parameters there is a range: T**{<=}T{<=}T* where coexistence is possible. Values for the phenomenological parameters are obtained from the experiment. In this paper we analyze the effects of an applied magnetic field on the range of T where the phase coexistence takes place, based on results obtained from dc-magnetization and ESR measurements.
Tovar, M;
Causa, M T;
[1]
Ramos, C.A. , E-mail: cramos@cab.cnea.gov.ar;
[1]
Laura-Ccahuana, D;
[1]
Universidad Nacional de Ingenieria, Av. Tupac Amaru 210, Rimac/Lima 25 (Peru)]
- Centro Atomico Bariloche and Instituto Balseiro, Comision Nacional de Energia Atomica and Universidad Nacional de Cuyo, 8400 San Carlos de Bariloche, Rio Negro (Argentina)
Citation Formats
Tovar, M, Causa, M T, Ramos, C.A. , E-mail: cramos@cab.cnea.gov.ar, Laura-Ccahuana, D, and Universidad Nacional de Ingenieria, Av. Tupac Amaru 210, Rimac/Lima 25 (Peru)].
Phase separation in La-Ca manganites: Magnetic field effects.
Netherlands: N. p.,
2008.
Web.
doi:10.1016/j.jmmm.2007.07.013.
Tovar, M, Causa, M T, Ramos, C.A. , E-mail: cramos@cab.cnea.gov.ar, Laura-Ccahuana, D, & Universidad Nacional de Ingenieria, Av. Tupac Amaru 210, Rimac/Lima 25 (Peru)].
Phase separation in La-Ca manganites: Magnetic field effects.
Netherlands.
https://doi.org/10.1016/j.jmmm.2007.07.013
Tovar, M, Causa, M T, Ramos, C.A. , E-mail: cramos@cab.cnea.gov.ar, Laura-Ccahuana, D, and Universidad Nacional de Ingenieria, Av. Tupac Amaru 210, Rimac/Lima 25 (Peru)].
2008.
"Phase separation in La-Ca manganites: Magnetic field effects."
Netherlands.
https://doi.org/10.1016/j.jmmm.2007.07.013.
@misc{etde_21045298,
title = {Phase separation in La-Ca manganites: Magnetic field effects}
author = {Tovar, M, Causa, M T, Ramos, C.A. , E-mail: cramos@cab.cnea.gov.ar, Laura-Ccahuana, D, and Universidad Nacional de Ingenieria, Av. Tupac Amaru 210, Rimac/Lima 25 (Peru)]}
abstractNote = {The coexistence of magnetic phases seems to be a characteristic of the La-Ca family of in colossal magnetoresistant manganites. We have analyzed this phenomenon in terms of a free energy, F, where magnetic and electronic contributions of two coexistent phases are included. Three order parameters describe the behavior of the mixed material: the magnetization of each phase and the metallic fraction. Due to the coupling between order parameters there is a range: T**{<=}T{<=}T* where coexistence is possible. Values for the phenomenological parameters are obtained from the experiment. In this paper we analyze the effects of an applied magnetic field on the range of T where the phase coexistence takes place, based on results obtained from dc-magnetization and ESR measurements.}
doi = {10.1016/j.jmmm.2007.07.013}
journal = []
issue = {3-4}
volume = {320}
place = {Netherlands}
year = {2008}
month = {Feb}
}
title = {Phase separation in La-Ca manganites: Magnetic field effects}
author = {Tovar, M, Causa, M T, Ramos, C.A. , E-mail: cramos@cab.cnea.gov.ar, Laura-Ccahuana, D, and Universidad Nacional de Ingenieria, Av. Tupac Amaru 210, Rimac/Lima 25 (Peru)]}
abstractNote = {The coexistence of magnetic phases seems to be a characteristic of the La-Ca family of in colossal magnetoresistant manganites. We have analyzed this phenomenon in terms of a free energy, F, where magnetic and electronic contributions of two coexistent phases are included. Three order parameters describe the behavior of the mixed material: the magnetization of each phase and the metallic fraction. Due to the coupling between order parameters there is a range: T**{<=}T{<=}T* where coexistence is possible. Values for the phenomenological parameters are obtained from the experiment. In this paper we analyze the effects of an applied magnetic field on the range of T where the phase coexistence takes place, based on results obtained from dc-magnetization and ESR measurements.}
doi = {10.1016/j.jmmm.2007.07.013}
journal = []
issue = {3-4}
volume = {320}
place = {Netherlands}
year = {2008}
month = {Feb}
}