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

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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, D M ≈ 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 \(\upgamma \)-Fe2O3 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, Núcleo de Física 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 Química, Universidade Federal de Goiás, 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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Correspondence to J. A. H. Coaquira.

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Coaquira, J.A.H., Rodriguez, A.F.R., Santos, J.G. et al. Magnetic characterization of maghemite nanoparticles dispersed in surface-treated polymeric template. Hyperfine Interact 176, 113–117 (2007). https://doi.org/10.1007/s10751-008-9641-9

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  • DOI: https://doi.org/10.1007/s10751-008-9641-9

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