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Pramana

, Volume 38, Issue 2, pp 171–177 | Cite as

On preparation of fine particles of MnFe2O4 and their magnetic properties

  • S N Dolia
  • Anjali Krishnamurthy
  • Bipin K Srivastava
  • Vipasha Ghose
Research Articles

Abstract

Influence of the heat treatment, following a wet chemical process, has been examined on the sizes of the obtained particles of MnFe2O4. X-ray diffraction, magnetization and Mössbauer measurements have been used. The average sizes of the obtained particles are in the range of ∼ 100 Å–300Å with the upper size limit being ∼ 450 Å and more. The average size as well as size distribution is strongly influenced by the nature of the heat treatment followed for preparation of the sample. Prolonged hydrothermal heating resulted in larger average size than did dry heating at 400°C of the precipitate obtained from the initial wet process. Further dry heating following hydrothermal treatment did not lead to any major growth. Chemical nature of the starting materials also affects the sizes.

Keywords

Fine particle systems ferrimagnetics 

PACS Nos

75·50 75·60 

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Copyright information

© Indian Academy of Sciences 1992

Authors and Affiliations

  • S N Dolia
    • 1
  • Anjali Krishnamurthy
    • 1
  • Bipin K Srivastava
    • 1
  • Vipasha Ghose
    • 1
  1. 1.Department of PhysicsUniversity of RajasthanJaipurIndia

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