Title
Magnetic characterization of maghemite nanoparticles dispersed in surface-treated polymeric template
Date Issued
01 April 2007
Access level
metadata only access
Resource Type
conference paper
Author(s)
Rodriguez A.F.R.
Santos J.G.
Silveira L.B.
Oliveira A.C.
Garg V.K.
Soares F.Q.
Rabelo D.
Morais P.C.
Universidade de Brasília
Publisher(s)
Springer Nature
Abstract
Magnetic characterization of maghemite nanoparticles dispersed in a polymeric template and treated under different chemical processes is reported in this work. Particle size estimated from magnetic measurements, DM ≈ 10 nm, for the free-surfactant sample, is consistent with values determined from XRD analysis and TEM images. The magnetic collapse of sextets towards a quadrupole doublet as the temperature is increased reveals the thermal relaxation of smaller γ-Fe2O3 nanoparticles. Magnetic measurements show a strong irreversibility between ZFC and FC curves suggesting the occurrence of particle-particle interaction. © 2008 Springer Science+Business Media B.V.
Start page
113
End page
117
Volume
176
Issue
March 1
Language
English
OCDE Knowledge area
Física de partículas, Campos de la Física
Nano-materiales
Subjects
Scopus EID
2-s2.0-52349089734
Source
Hyperfine Interactions
ISSN of the container
03043843
Sponsor(s)
Acknowledgements The authors thank O. F. de Lima for access to magnetic facilities. The authors also wish to thank S. N. Báo for TEM experiments. This work was financially supported by the Brazilian agencies FINATEC and MCT/CNPq.
Sources of information:
Directorio de Producción Científica
Scopus