Synthesis, studies and growth mechanism of ferromagnetic NiFe 2 O 4 nanosheet

P. Sivakumar, R. Ramesh, A. Ramanand, S. Ponnusamy, C. Muthamizhchelvan

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82 Scopus citations

Abstract

Nickel ferrite (NiFe 2 O 4 ) nanoparticles were prepared by a simple and cost-effective method using nickel nitrate, ferric nitrate, ethylene glycol and citric acid via polyvinylpyrrolidone (PVP) assisted sol-gel auto-combustion method. The structure, composition, morphology and magnetic properties of the gel precursor were characterised XRD confirmed the formation of single phase NiFe 2 O 4 with space group Fd3 m and inverse spinel structure and the crystallite size was found to be 29 nm. The FT-IR showed absorption bands, which were assigned to the vibration of tetrahedral and octahedral complexes. The thermal decomposition of the gel precursors was investigated by TGA. HR-SEM and TEM images showed sheet-like nanostructure. The magnetic properties of these nanosheets were studied for the enlightening ferromagnetic behaviour at room temperature. The magnetic saturation (M s = 41.70 emu g -1 ), remanent magnetisation (M r = 7.57 emu g -1 ) and coercive force (H c = 162.47 Oe), were determined.

Original languageEnglish
Pages (from-to)6648-6652
Number of pages5
JournalApplied Surface Science
Volume258
Issue number17
DOIs
StatePublished - 15 Jun 2012

Keywords

  • Chemical synthesis
  • Nanostructure
  • Polymer
  • VSM

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