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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Magnetic states and valence fluctuations in charge frustrated polycrystalline lutetium ferrite samples

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Viana, D. S. F. [1] ; Garcia, D. [1] ; Eiras, Jose A. [1] ; Olzon-Dionysio, M. [1] ; Souza, S. D. [1] ; Montanher, D. Z. [2] ; Cotica, L. F. [2] ; Santos, I. A. [2] ; Coelho, A. A. [3] ; Gotardo, R. A. M. [4]
Total Authors: 10
[1] Univ Fed Sao Carlos, Dept Fis, BR-13565345 Sao Paulo - Brazil
[2] Univ Estadual Maringa, Dept Fis, BR-87020900 Maringa, Parana - Brazil
[3] Univ Estadual Campinas, Dept Fis Aplicada, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP - Brazil
[4] Univ Tecnol Fed Parana, BR-86300000 Cornelio Procopio, Parana - Brazil
Total Affiliations: 4
Document type: Journal article
Source: SCRIPTA MATERIALIA; v. 69, n. 9, p. 670-673, NOV 2013.
Web of Science Citations: 1

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. (AU)

FAPESP's process: 08/04025-0 - Nanostructured multifunctional multiferroic materials: synthesis, properties, phenomenology and applications
Grantee:José Antonio Eiras
Support type: Research Projects - Thematic Grants