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|Type:||Artigo de periódico|
|Title:||Coercivity behavior in Gd(Co1-xCux)(5) system as function of the microstructure evolution|
de Oliveira, LAS
|Abstract:||Magnetic measurements, X-ray diffraction and scanning electron microscopy (SEM) experiments were carried out in the as-cast Gd(Co1-xCux)(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 CaCu5-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. (C) 2013 Elsevier B.V. All rights reserved.|
High coercivity materials
Rare earth metals and alloys
|Editor:||Elsevier Science Bv|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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