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Magnetic characterization of maghemite nanoparticles dispersed in surface-treated polymeric template

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HFI/NQI 2007

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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 ψ-Fe203 nanoparticles. Magnetic measurements show a strong irreversibility between ZFC and FC curves suggesting the occurrence of particle-particle interaction.

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Authors and Affiliations

  1. Instituto de Física, Niicleo de Ffsica Aplicada, Universidade de Brasília, Brasília, Distrito Federal, 70919-970, Brazil

    J. A. H. Coaquira, A. F. R. Rodriguez, A. C. Oliveira, V. K. Garg & P. C. Morais

  2. Departamento de Ciências Exatas e da Natureza, Fundação Universidade Federal de Rondônia, Ji-Paraná, Rondonia, 78961-970, Brazil

    J. G. Santos & L. B. Silveira

  3. Instituto de Ouínica, Universidade Federal de Goias, Goiânia, Goias, 74001-970, Brazil

    F. Q. Soares & D. Rabelo

Authors
  1. J. A. H. Coaquira
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  2. A. F. R. Rodriguez
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  3. J. G. Santos
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  4. L. B. Silveira
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  5. A. C. Oliveira
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  6. V. K. Garg
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  7. F. Q. Soares
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  8. D. Rabelo
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  9. P. C. Morais
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Corresponding author

Correspondence to J. A. H. Coaquira .

Editor information

Editors and Affiliations

  1. University of La Plata, La Plata, Argentina

    A. Pasquevich  & M. Rentería  & 

  2. Centro Brasileiro de Pesquisas Física, Rio de Janeiro, Brasil

    E. Baggio Saitovitch

  3. University of São Paulo, São Paulo, Brazil

    H. Petrilli

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Coaquira, J.A.H. et al. (2008). Magnetic characterization of maghemite nanoparticles dispersed in surface-treated polymeric template. In: Pasquevich, A., Rentería, M., Saitovitch, E.B., Petrilli, H. (eds) HFI/NQI 2007. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-85320-6_18

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  • DOI: https://doi.org/10.1007/978-3-540-85320-6_18

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-85319-0

  • Online ISBN: 978-3-540-85320-6

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

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