Magnetic field-induced ferromagnetism in iron oxide microspheres

Junhong Wang, Lei Wang, Peng Yu, Dongliang Wang, Yanwei Ma, Kazuo Watanabe

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


A magnetic field of 12 T was applied during the annealing of amorphous α-Fe2O3 microspheres. The authors demonstrate that magnetic field processing leads to the formation of γ-Fe2O3 phases in the microspheres, and the field-treated microspheres exhibit typical room-temperature ferromagnetic behavior, whereas non-field-heated sample presents paramagnetism. The improvement in magnetic properties is considered to be a result of magnetic field-induced transformation from α-Fe2O3 to γ-Fe2O3.

Original languageEnglish
Pages (from-to)3411-3414
Number of pages4
JournalJournal of Magnetism and Magnetic Materials
Issue number20
Publication statusPublished - 2009 Oct
Externally publishedYes


  • Iron oxide
  • Magnetic annealing
  • Magnetic property

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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