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Type: Artigo de periódico
Title: Coercivity Behavior In Gd (co1-x Cux)5 System As Function Of The Microstructureevolution
Author: Penton-Madrigal A.
De Oliveira L.A.S.
Sinnecker J.P.
Souza D.M.
Grossinger R.
Concepcion-Rosabal B.
Estevez-Rams E.
Diaz-Castanon S.
Abstract: Magnetic measurements, X-ray diffraction and scanning electron microscopy (SEM) experiments were carried out in the as-cast Gd(Co1-x Cux)5 samples with different Co/Cu content. Already in the as cast state, this system shows high coercive field for x=0.3 and a magnetization driven by nucleation of reversal domain. SEM micrograph and microanalysis show possible spinodal decomposition in the as-cast state, hence regions with different Co/Cu-content are observed, while the Gd-content almost does not change. High resolution X-ray diffraction patterns show a main CaCu5-type structure with traces of a secondary phase and distorted peak profiles as function of the Cu content. The evolution of the microstructure is discussed in relation with the Cu incorporation into the CaCu 5-type structure. The Cu addition avoids the formation of the 2:7 phase within the 1:5 matrix, favoring the formation of a more homogeneous Gd(Co,Cu)5 phase. The relation between the observed microstructure and the magnetic behavior is also discussed. © 2013 Elsevier B.V. All rights reserved.
Rights: fechado
Identifier DOI: 10.1016/j.physb.2013.01.024
Date Issue: 2013
Appears in Collections:Unicamp - Artigos e Outros Documentos

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