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Type: Artigo de periódico
Title: Magnetic states and valence fluctuations in charge frustrated polycrystalline lutetium ferrite samples
Author: Viana, DSF
Garcia, D
Eiras, JA
Olzon-Dionysio, M
Souza, SD
Montanher, DZ
Cotica, LF
Santos, IA
Coelho, AA
Gotardo, RAM
Abstract: LuFe2O4 polycrystalline materials were processed by an innovative protocol using high-energy ball milling and thermal treatments in an argon flux. The results of room-temperature Mossbauer spectroscopy showed different concentrations of Fe2+ and Fe3+ in samples treated for different time periods. Magnetic studies revealed multiple magnetic transitions and showed that valence fluctuations resulted in samples with distinguishable magnetic behaviors. In fact, an additional anomaly in the M x T curve was observed for the LuFe2O4 sample thermally treated for 1 h at 1473 K. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
Subject: Multiferroic
Magnetic states
Country: Inglaterra
Editor: Pergamon-elsevier Science Ltd
Citation: Scripta Materialia. Pergamon-elsevier Science Ltd, v. 69, n. 9, n. 670, n. 673, 2013.
Rights: fechado
Identifier DOI: 10.1016/j.scriptamat.2013.07.027
Date Issue: 2013
Appears in Collections:Unicamp - Artigos e Outros Documentos

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