Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/86830
Type: Artigo
Title: Magnetic and structural investigations on La0.6Sr0.4Mno3 nanostructured manganite: evidence of a ferrimagnetic shell
Author: Andrade, V. M.
Caraballo-Vivas, R. J.
Costas-Soares, T.
Pedro, S. S.
Rocco, D. L.
Reis, M. S.
Campos, A. P. C.
Coelho, A. A.
Abstract: This paper presents the structural and magnetic properties of La 0.6Sr0.4MnO3 nanoparticles with sizes from 21 to 106 nm, which have been prepared using the sol-gel method. The reduction of the nanoparticles' size tends to broaden the paramagnetic to ferromagnetic transition, as well as to promote magnetic hysteresis and a remarkable change on the magnetic saturation. In order to better understand the magnetic behavior of those nanoparticles, a simple model based on a ferromagnetic core and a ferrimagnetic shell was considered, where the magnetization was described in terms of the standard mean-field Brillouin function. This model matches the experimental data, leading to conclusion the nanoparticles with size <40nm are single magnetic domain. In addition, the output fitting parameters give information on the Landé factor of the core and shell. © 2014 Elsevier Inc.
This paper presents the structural and magnetic properties of La0.6Sr0.4MnO3 nanoparticles with sizes from 21 to 106 nm, which have been prepared using the sol-gel method. The reduction of the nanoparticles' size tends to broaden the paramagnetic to ferromagnetic transition, as well as to promote magnetic hysteresis and a remarkable change on the magnetic saturation. In order to better understand the magnetic behavior of those nanoparticles, a simple model based on a ferromagnetic core and a ferrimagnetic shell was considered, where the magnetization was described in terms of the standard mean-field Brillouin function. This model matches the experimental data, leading to conclusion the nanoparticles with size <40 nm are single magnetic domain. In addition, the output fitting parameters give information on the Lande factor of the core and shell.
Subject: Materiais nanoestruturados
Medições magnéticas
Country: Estados Unidos
Editor: Academic Press Inc Elsevier Science
Citation: Journal Of Solid State Chemistry. Academic Press Inc., v. 219, n. , p. 87 - 92, 2014.
Rights: fechado
Identifier DOI: 10.1016/j.jssc.2014.07.013
Address: https://www.sciencedirect.com/science/article/pii/S0022459614003090
Date Issue: 2014
Appears in Collections:IFGW - Artigos e Outros Documentos

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