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Mössbauer studies on ultraporous Fe-Oxide/SiO2 aerogel

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ICAME 2005

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Abstract

Magnetic aerogels with very low volume density of ∼0.2 g/cm3 were prepared by sol-gel method and supercritical drying. The resulting materials were monolithic and displayed high surface area. By X-ray diffraction and Mössbauer spectroscopy the crystalline phase formed inside the mesopores of the SiO2 matrix was identified as a spinel iron oxide. Comparison of the magnetic measurements with Mössbauer spectra at various temperatures contributed to the elucidation of the magnetic state of this nanocomposite system with restricted magnetic interactions, in particular its transition to a superparamagnetic state.

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Author information

Authors and Affiliations

  1. Joint Laboratory of Low Temperatures, V Holešovičkách 2, 180 00, Prague, Czech Republic

    A. Lančok & K. Závěta

  2. Institute of Chemistry Timisoara of Romanian Academy, 24 Mihai Viteazul Blvd., 300223, Bucharest, Romania

    M. Popovici & C. Savii

  3. Institut de Ciència de Materials de Barcelona (CSIC), Esfera UAB, 08193, Bellaterra, Catalonia, Spain

    M. Gich, A. Roig & E. Molins

  4. Institute of Physics, Technical University of Ostrava, 17. listopadu 15, 70833, Ostrava, Czech Republic

    K. Barčová

Authors
  1. A. Lančok
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  2. K. Závěta
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  3. M. Popovici
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  4. C. Savii
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  5. M. Gich
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  6. A. Roig
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  7. E. Molins
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  8. K. Barčová
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Corresponding author

Correspondence to A. Lančok .

Editor information

Editors and Affiliations

  1. Université Montpellier II - CNRS, Montpellier, France

    P. -E. Lippens  & J. -C. Jumas  & 

  2. Université Henri Poincaré-Nancy I, Villers-lès-Nancy, France

    J. -M. R. Génin

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© 2006 Springer Science + Business Media B.V.

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Lančok, A. et al. (2006). Mössbauer studies on ultraporous Fe-Oxide/SiO2 aerogel. In: Lippens, P.E., Jumas, J.C., Génin, J.M.R. (eds) ICAME 2005. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-49850-6_29

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  • DOI: https://doi.org/10.1007/978-3-540-49850-6_29

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-49848-3

  • Online ISBN: 978-3-540-49850-6

  • eBook Packages: Physics and AstronomyPhysics and Astronomy (R0)

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