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Influence of Ag on the Magnetic Anisotropy of Fe3O4 Nanocomposites

  • Ana Carla Batista de JesusEmail author
  • Cristiane Cupertino Santos Barbosa
  • Erilaine Barreto Peixoto
  • Jonathas Rafael de Jesus
  • Jorge Luiz da Silva Filho
  • Fernanda Antunes Fabian
  • Ivani Meneses Costa
  • José Gerivaldo dos Santos Duque
  • Cristiano Teles de Meneses
Original Paper
  • 25 Downloads

Abstract

In this work, the thermal decomposition method is used to obtain Fe3O4-Ag nanocomposites. The weight losses observed in the thermogravimetric measurements are used to estimate the amount of organic mass present in the samples. Fourier-transform infrared (FTIR) spectra show characteristic absorption peaks of the stretching vibration of the Fe-O and C-H groups. Samples are characterized structurally and morphologically by measurements of X-ray diffraction (XRD) and transmission electronic microscopy (TEM), respectively. The XRD patterns indicate the formation of a cubic phase with spinel crystallographic structure. Particles sizes analysis estimated by Scherrer’s equation for Fe3O4 phase show that sizes are unaffected by the Ag-insertion. TEM images reveal that the nanoparticles have a spherical-like shape and a mean particles sizes ranging 3 < d < 4 nm. The best fits of zero-field-cooling and field-cooling (ZFC/FC) curves allow us to state that the magnetic anisotropy constant decreasing as a function of Ag concentration.

Keywords

Nanocomposites Thermal decomposition Anisotropy constant 

Notes

Acknowledgments

The authors thank CMNano-UFS for providing laboratory access.

Funding Information

This work was supported by the Brazilian funding agencies CNPq (455608/2014-8, 455970/2014-9 and 152026/2016-9), FAPITEC (PRONEX). This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior—Brasil (CAPES)—Finance Code 001.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • Ana Carla Batista de Jesus
    • 1
    Email author
  • Cristiane Cupertino Santos Barbosa
    • 1
  • Erilaine Barreto Peixoto
    • 1
  • Jonathas Rafael de Jesus
    • 1
  • Jorge Luiz da Silva Filho
    • 2
  • Fernanda Antunes Fabian
    • 3
  • Ivani Meneses Costa
    • 4
  • José Gerivaldo dos Santos Duque
    • 1
    • 5
  • Cristiano Teles de Meneses
    • 1
    • 5
  1. 1.Programa de Pós-Graduação em FísicaUniversidade Federal de Sergipe-UFSSão CristóvãoBrazil
  2. 2.Programa de Pós-Graduação em Ciência e Engenharia de Materiais - P2CEMUniversidade Federal de Sergipe-UFSSão CristóvãoBrazil
  3. 3.Departamento de FísicaFundação Universidade Federal de Rondônia-UNIRPorto VelhoBrazil
  4. 4.Programa de Pós-Graduação em FísicaUniversidade Federal de São Carlos-UFSCarSão CarlosBrazil
  5. 5.Departamento de FísicaUniversidade Federal de Sergipe-UFSItabaianaBrazil

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