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Type: Artigo de periódico
Title: Fe valence fluctuations and magnetoelastic coupling in Pb-based multiferroics perovskites
Author: Fraygola, B
Mesquita, A
Coelho, AA
Garcia, D
Mastelaro, VR
Eiras, JA
Abstract: Lead-based multiferroics perovskites with nominal compositions Pb(Fe1/2Nb1/2)O-3 and Pb(Fe2/3W1/3)O-3 were synthesized following a two-stage method. Magnetic proprieties were investigated and correlated to anelastic proprieties, measured by the conventional pulse-echo method. The discussions are focused in the region around 250 K, where magnetoelectroe-lastic instabilities have been observed. X-ray absorption near-edge structure (XANES) study further indicates that the edge position varies with temperature revealing a fluctuation on the valence of iron ions with the temperature, which can be related to a variation in anelastic and magnetic proprieties. (C) 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Subject: anelastic
Country: Alemanha
Editor: Wiley-v C H Verlag Gmbh
Citation: Physica Status Solidi A-applications And Materials Science. Wiley-v C H Verlag Gmbh, v. 210, n. 2, n. 386, n. 390, 2013.
Rights: fechado
Identifier DOI: 10.1002/pssa.201228376
Date Issue: 2013
Appears in Collections:Unicamp - Artigos e Outros Documentos

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