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Temperature dependence of the magnetic properties in LaMn O3+δ

AuthorsPalomares, F. Javier ; Pigazo, F. ; Romero Fanego, Juan José ; Cuadrado, Ramón ; Arroyo, Antonio ; García García-Tuñón, Miguel Ángel ; Hernando, Antonio ; Cortés-Gil, R.; González-Calbet, José M.; Vallet-Regí, María; González Fernández, Jesús María ; Alonso, José M.
Issue Date2006
PublisherAmerican Institute of Physics
CitationJournal of Applied Physics 99(8): 08A702 (2006)
AbstractData are presented on the thermal dependence of the hysteretic properties of cationic vacancies including manganite samples of composition LaMn O3+δ (δ=0.05 and 0.12). Our results evidence the presence in both samples of two magnetic phases having ferro- and antiferromagnetic orders, respectively. The temperature dependence of the coercivity and relaxational properties of the samples is closely linked to the connectivity of the magnetic moment bearing Mn3+ - Mn4+ ferromagnetic clusters that demagnetize independently in the case of the δ=0.05 sample and collectively in that of the δ=0.12 one, as evidenced from the activation volume results (δ=0.05) which yielded a size of the same order magnitude as that obtained in previous works for the Mn3+ - Mn4+ ferromagnetic cluster size. © 2006 American Institute of Physics.
Publisher version (URL)http://dx.doi.org/10.1063/1.2150388
Identifiersdoi: 10.1063/1.2150388
issn: 0021-8979
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