Hostname: page-component-745bb68f8f-f46jp Total loading time: 0 Render date: 2025-01-26T05:14:22.773Z Has data issue: false hasContentIssue false
  • English
  • Français

Formation Study of Nanocomposite Thin Films of Ferrite Dispersed in a Silica Matrix Prepared by sol-Gel Process

Published online by Cambridge University Press:  10 February 2011

Nelcy D. S. Mohallem  and
Luciana M. Seara
Nelcy D. S. Mohallem
Affiliation:
Laboratório de Materiais – Department of Chemistry, ICEx, Federal University of Minas Gerais 31270-901 Belo Horizonte, MG, [email protected]
Luciana M. Seara
Affiliation:
Laboratório de Materiais – Department of Chemistry, ICEx, Federal University of Minas Gerais 31270-901 Belo Horizonte, MG, [email protected]
Get access

Abstract

Magnetic nanocomposite thin films formed by cobalt ferrite dispersed in silica matrix were prepared by sol-gel process using tetraethylorthosilicate (TEOS) as a precursor of silica, and metallic nitrates as precursors of the ferrite. The films were prepared with 5–50 wt. % ferrite contents and deposited on substrate using the dip-coating process. The films obtained were adherent, transparent, homogeneous and free of microcracks, with thickness between 30 and 500 nm. The films obtained presented crystalline CoFe2O4 phases dispersed in SiO2 amorphous matrix and saturation magnetization of approximately 9 emu/g considering the composite mass and 30 emu/g considering the ferrite mass.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 775: Symposium P – Self-Assembled Nanostructured Materials , 2003 , P3.23
Copyright
Copyright © Materials Research Society 2003

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Ennas, G., Casula, MF., Falqui, A., Gatteschi, D., Marongiu, G., Marras, S., Piccaluga, G.; J. of Sol-Gel Sci. and Techn. 26 (2003) 463.Google Scholar
2. Plocek, J. et al, J. Of Non-Cryst. Solids 315(2003)70.Google Scholar
3. Guang-She, L., Li-Ping, L., Smith, R. L. Jr , Inomata, H., J. Molec. Struct. 560 (2001) 87.Google Scholar
4. Hirai, T., Kobayashi, J., Komasawa, I., Langmuir 15 (1999) 6291.Google Scholar
5. Yan, C., Cheng, F., Liao, C., Kuang, J., Xu, Z., Chen, L., Zhao, H., Liu, Z., Wang, Y., Zhu, T., He, G., J. Magn. Magn. Mater. 192 (1999) 396–402.Google Scholar
6. Brinker, C. J. (Ed.), The Physics and Chemistry of Sol-Gel Processing, Academic Press, San Diego, 1990.Google Scholar
7. Martucci, A., Bassiri, N., Guglielmi, M., Armelao, L., Gross, S., Pivin, J. C.; J. of Sol-Gel Sci. and Techn. 26 (2003) 993.Google Scholar
8. Lee, J. G., Park, J. Y., Oh, Y. J., Kim, C. S.; J. of App. Phys. 84, 5 (1998) 2801 Google Scholar
9. S. Mohallem, N. D., Seara, L. M.; Appl. Surface Sci. 214 (2003) 143–150.Google Scholar