Enhancing the stabilization of nanostructured rocksalt-like high entropy oxide by Gd addition

Autor(es)

Cardoso, Andre L. F. ^{[1, 2]} ; Perdomo, Claudia P. F. ^[1] ; Kiminami, Ruth H. G. A. ^[1] ; Gunnewiek, Rodolfo F. K. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Grad Program Mat Sci & Engn, Rodovia Washington Luiz Km 235, BR-13565905 Sao Carlos, SP - Brazil

^[2] Univ Fed Alfenas, Grad Program Mat Sci & Engn, Rodovia Jose Aurelio Vilela 11999, BR-37715400 Pocos De Caldas, MG - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Materials Letters; v. 285, FEB 15 2021.
• Citações Web of Science: 2

Resumo

In this work, nanostructured single phase high entropy oxide was easily synthesized by a fast polymeric solution method. Despite the higher ionic radius, coordination and oxidation state, gadolinium was homogeneously distributed in crystallites. Their effect on the lattice was studied by Raman spectroscopy, transmission electron microscopy and X-ray diffraction. The configurational entropy increased with the addition of Gd3+, but the expansion in the lattice is mostly associated to the diffusion of copper to the crystal. However, gadolinium enhances the asymmetry on longitudinal-optic (A(1g)) Raman mode and also prevents the excessive growth of crystallites. (c) 2020 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 17/13769-1 - Materiais multiferróicos e ferroelétricos para conversores de energia: síntese, propriedades, fenomenologia e aplicações
• Beneficiário: José Antonio Eiras
• Modalidade de apoio: Auxílio à Pesquisa - Temático