Lithium ferrite nanoparticles for ferrofluid applications

V. K. Sankaranarayanan, Om Prakash, R. P. Pant, Mohammad Islam

Research output: Contribution to journalArticlepeer-review

52 Citations (Scopus)


Nanoparticles of Lithium ferrite in the particle size range of 10nm have been prepared by a citrate precursor method at a relatively low temperature of 200°C. The particles show characteristic infra red (IR) spectrum of lithium ferrite and broadened X-ray diffraction (XRD) patterns typical of the nanoparticle nature. The sample decomposed at 200°C has the β-LiFe 5O8 type (a disordered type of spinel) structure which on annealing at 350°C transforms to the α-LiFe5O8 type (an ordered type spinel) structure as shown by both IR spectra and XRD studies. Magnetization curves indicate a particle size distribution consisting of both ferromagnetic particles and a superparamagnetic fraction. With 4ΠMs values of 2000G these particles could be useful for applications in certain low magnetization ferrofluids.

Original languageEnglish
Pages (from-to)7-9
Number of pages3
JournalJournal of Magnetism and Magnetic Materials
Publication statusPublished - Nov 2002
Externally publishedYes


  • Ferrofluids
  • Lithium ferrite
  • Nanoparticles and magnetization

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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