Influence of preparation method on structural and magnetic properties of nickel ferrite nanoparticles

Binu P. Jacob, Ashok Kumar, R. P. Pant, Sukhvir Singh, E. M. Mohammed

Research output: Contribution to journalArticlepeer-review

129 Citations (Scopus)

Abstract

Nickel ferrite nanoparticles of very small size were prepared by sol-gel combustion and co-precipitation techniques. At the same annealing temperature sol-gel derived particles had bigger crystallite size. In both methods, crystallite size of the particles increased with annealing temperature. Sol-gel derived nickel ferrite particles were found to be of almost spherical shape and moderate particle size with a narrow size distribution; while co-precipitation derived particles had irregular shape and very small particle size with a wide size distribution. Nickel ferrite particles produced by sol-gel method exhibited more purity. Sol-gel synthesized nanoparticles were found to be of high saturation magnetization and hysteresis. Co-precipitation derived nickel ferrite particles, annealed at 400°C exhibited superparamagnetic nature with small saturation magnetization. Saturation magnetization increased with annealing temperature in both the methods. At the annealing temperature of 600°C, co-precipitation derived particles also became ferrimagnetic.

Original languageEnglish
Pages (from-to)1345-1350
Number of pages6
JournalBulletin of Materials Science
Volume34
Issue number7
DOIs
Publication statusPublished - Dec 2011
Externally publishedYes

Keywords

  • Co-precipitation
  • Nickel ferrite
  • Sol-gel technique
  • Superparamagnetism

ASJC Scopus subject areas

  • General Materials Science
  • Mechanics of Materials

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