Electronic structure and magnetic properties of FeWO4 nanocrystals synthesized by the microwave-hydrothermal method

Autor(es)

Almeida, M. A. P. ^[1] ; Cavalcante, L. S. ^[2] ; Morilla-Santos, C. ^[3] ; Lisboa Filho, P. N. ^[3] ; Beltran, A. ^[4] ; Andres, J. ^[4] ; Gracia, L. ^[4] ; Longo, E. ^{[1, 2]}

Afiliação do(s) autor(es)

^[1] INCTMN DQ Univ Fed Sao Carlos, BR-13565905 Sao Carlos, SP - Brazil

^[2] INCTMN Univ Estadual, BR-14801907 Araraquara, SP - Brazil

^[3] MAu Univ Estadual, BR-17033360 Bauru, SP - Brazil

^[4] Univ Jaume 1, Dept Quim Fis & Analit, E-12071 Castellon de La Plana - Spain

• Tipo de documento: Artigo Científico
• Fonte: MATERIALS CHARACTERIZATION; v. 73, p. 124-129, NOV 2012.
• Citações Web of Science: 13

Resumo

This communication reports that FeWO4 nanocrystals were successfully synthesized by the microwave-hydrothermal method at 443 K for 1 h. The structure and shape of these nanocrystals were characterized by X-ray diffraction, Rietveld refinement, and transmission electron microscopy. The experimental results and first principles calculations were combined to explain the electronic structure and magnetic properties. Experimental data were obtained by magnetization measurements for different applied magnetic fields. Theoretical calculations revealed that magnetic properties of FeWO4 nanocrystals can be assigned to two magnetic orderings with parallel or antiparallel spins in adjacent chains. These factors are crucial to understanding of competition between ferro- and antiferromagnetic behavior. (C) 2012 Elsevier Inc. All rights reserved. (AU)

• Processo FAPESP: 09/53189-8 - Propriedades fotoluminescentes e fotocataliticas dos tungstatos de ferro e manganes
• Beneficiário: Marcio Aurélio Pinheiro Almeida
• Modalidade de apoio: Bolsas no Brasil - Doutorado