Advertisement

Pramana

, Volume 19, Issue 1, pp 103–106 | Cite as

Magnetic domain behaviour of MgFe2O4-CoFe2O4 system

  • Venkatesh Rao
  • H V Keer
Solid State Physics

Abstract

Ferrites with the composition Mg1−x CO x Fe2O4(0<x≤0·33) were synthesized by solid state reaction between MgO,α-Fe2O3 and CoFe2O4 at 1300°C. The compounds were analyzed from the results of x-ray diffraction, magnetic hysteresis and initial susceptibility (χ) studies. All the compounds of the series were found to be monophasic with no appreciable change in their lattice parameter. The saturation magnetization and coercive field (H c ) values increased with increasing cobalt ferrite content. Similarly, the shapes of theχ-T curves and temperature variations ofH c values indicated that the magnetic behaviour changes from multi-domain to single domain with increasing cobalt content. The results are similar to those observed for the (MgFe2O4)1−x (Co3O4) system.

Keywords

Mixed ferrites magnetic domain behaviour magnetic hysteresis initial susceptibility 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Bean C P 1955J. Appl. Phys. 26 1381CrossRefADSGoogle Scholar
  2. Berkowitz A E and Schuele W J 1959J. Appl. Phys. 30 1345Google Scholar
  3. Hasegawa K and Sato T 1967J. Appl. Phys. 38 4707CrossRefADSGoogle Scholar
  4. Likhite S D, Radhakrishnamurty C and Sahasrabudhe P W 1965Rev. Sci. Instrum. 36 1558CrossRefADSGoogle Scholar
  5. Nagarajan R and Radhakrishnamurty C 1981Bull. Mater. Sci. 3 217Google Scholar
  6. Néel L 1948Ann. Phys. 3 137Google Scholar
  7. Radhakrishnamurty C and Likhite S D 1970Earth Planet. Sci. Lett. 7 389CrossRefADSGoogle Scholar
  8. Radhakrishnamurty C and Nanadikar N G 1979Pramana 13 413ADSCrossRefGoogle Scholar
  9. Venkatesh Rao 1975Synthesis and properties of some magnetic materials Ph.D. Thesis, I I T., BombayGoogle Scholar

Copyright information

© the Indian Academy of Sciences 1982

Authors and Affiliations

  • Venkatesh Rao
    • 1
  • H V Keer
    • 1
  1. 1.Department of ChemistryIndian Institute of TechnologyBombayIndia

Personalised recommendations