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Mössbauer Study of Ni-Zn Ferrites Obtained by the Self-Propagated Method

  • S. Jacobo
  • S. Duhalde
  • G. Quintana
  • R. Rotelo
  • A. F. Pasquevich

Abstract

Ni1−xZnxFe2O4 ferrites (x = 0, 0.5, 0.6 and 0.7) were prepared from self-propagated powders. Their structural and magnetic properties were characterised with x-ray diffraction, Mössbauer spectroscopy and ac susceptibility. Mössbauer analysis was performed at room temperature and at 15K, which was expected to yield useful information on the microstructure. The sintered samples present high initial permeability that increases as the concentration of Zn increases. The x= 0.7 Mössbauer spectrum exhibits superparamagnetism at room temperature and magnetic order at low temperature. The roles of cation-site occupation and magnetic coupling are discussed.

Keywords

Isomer Shift Hyperfine Field Magnetic Coupling Hyperfine Magnetic Field Eddy Current Loss 
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Copyright information

© Springer Science+Business Media Dordrecht 2002

Authors and Affiliations

  • S. Jacobo
    • 1
  • S. Duhalde
    • 1
  • G. Quintana
    • 1
  • R. Rotelo
    • 1
  • A. F. Pasquevich
    • 2
  1. 1.Facultad de IngenieríaUniversidad de Buenos AiresBuenos AiresArgentina
  2. 2.Facultad de Ciencias ExactasUniversidad Nacional de La Plata, CC 67La PlataArgentina

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