TY - JOUR
T1 - Formation mechanism of nano-crystalline β-Fe2O3 particles with bixbyite structure and their magnetic properties
AU - Danno, T.
AU - Asaoka, H.
AU - Nakanishi, M.
AU - Fujii, T.
AU - Ikeda, Y.
AU - Kusano, Y.
AU - Takada, J.
PY - 2010
Y1 - 2010
N2 - 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.
AB - 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.
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U2 - 10.1088/1742-6596/200/8/082003
DO - 10.1088/1742-6596/200/8/082003
M3 - Conference article
AN - SCOPUS:77957049642
VL - 200
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
IS - SECTION 8
M1 - 082003
ER -