Ferromagnetic resonance investigation of maghemite-silica nanocomposites

被引：0

作者：

Pereira, A.R. ^{[1
]}

Miranda, K.L.C. ^{[2
]}

Sartoratto, P.P.C. ^{[2
]}

Morais, P.C. ^{[3
]}

Bakuzis, A.F. ^{[4
]}

机构：

[1] Departamento de Matemática, Instituto de Cîncias e Letras Do &#7742dio Araguaia, Universidade Federal de Mato Grosso, 78698-000 Pontal do Araguaia-MT, Brazil

[2] Instituto de Química, Universidade Federal de Goiás, 74001-970 Goiânia-GO, Brazil

[3] Núcleo de Física Aplicada, Instituto de Física, Universidade de Brasília, 70919-970 Brasília-DF, Brazil

[4] Instituto de Física, Universidade Federal de Goiás, 74001-970 Goiânia-GO, Brazil

来源：

Journal of Applied Physics | 2006年 / 100卷 / 08期

关键词：

Maghemite-silica nanocomposites were prepared from water-based magnetic fluids through the sol-gel method. X-ray diffraction revealed that the maghemite nanoparticles had a size of 5 nm. Electron magnetic resonance of the composites was studied as a function of temperature and nanoparticle concentration. The resonance field was found to decrease upon increasing the maghemite concentration; while the linewidth increased. The effect was interpreted in terms of interparticle as well as intraparticle magnetic interactions. The data analysis suggests the presence of small agglomerates in the maghemite-silica nanocomposite for higher particle concentrations. © 2006 American Institute of Physics;

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摘要：

Journal article (JA)

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