Formation mechanism of nano-crystalline β-Fe2O3 particles with bixbyite structure and their magnetic properties

T. Danno, H. Asaoka, M. Nakanishi, T. Fujii, Y. Ikeda, Y. Kusano, J. Takada

Research output: Contribution to journalConference articlepeer-review

14 Citations (Scopus)

Abstract

Formation mechanism of nano-crystalline β-Fe2O3 particles was investigated by controlling the preparation conditions such as the mixing ratio of NaFe(SO4)2 to NaCl and heating treatment temperature. A single phase of β-Fe2O3 was formed regardless of the mixing ratio. The heat treatment temperature strongly affected the particle shapes and sizes. Below 490 °C, they had granular shape with a diameter of about 50 to 100 nm. While, above 490 °C, cubic particles with increased size of about 1 μm were produced. All samples were antiferromagnetic at low temperature. The Néel temperature (T N) of 119 K for the large cubic particles was decreased to 113 K for the nanoparticles.

Original languageEnglish
Article number082003
JournalJournal of Physics: Conference Series
Volume200
Issue numberSECTION 8
DOIs
Publication statusPublished - Jan 1 2010

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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