Effect of high magnetic field annealing on the microstructure and magnetic properties of CoFe layered double hydroxide

Xiong Zhang, Dongliang Wang, Shuxia Zhang, Yanwei Ma, Wensheng Yang, Yi Wang, Satoshi Awaji, Kazuo Watanabe

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

The effects of high magnetic field (10 T) on the products obtained by calcination of CoFe LDH precursors at different temperatures were investigated. The XRD results indicated that FeIII substituted for CoIII in Co3O4 to yield CoIICoIIIFe IIIO4 under the calcination of CoFe LDH precursors at 400 °C. The products obtained by magnetic field annealing at 400 °C had a porous plate-like morphology, whereas the products without magnetic field annealing were composed of nanoparticles. It was seen that CoFe 2O4 phase could be formed at low temperature (about 500 °C) under the magnetic field annealing. The grain size of products obtained by magnetic field annealing at 800 °C was larger than that of zero magnetic field. It was found that the saturation magnetization was significantly enhanced after magnetic field annealing, especially at lower temperature (≤600 °C). The possible reason for the effects on the microstructure and magnetic properties of products obtained by magnetic field annealing was discussed.

Original languageEnglish
Pages (from-to)3023-3027
Number of pages5
JournalJournal of Magnetism and Magnetic Materials
Volume322
Issue number20
DOIs
Publication statusPublished - 2010 Oct

Keywords

  • CoFe layered double hydroxide
  • CoFeO
  • Magnetic field annealing
  • Magnetic property

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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