Magnetic nanoparticles of Fe2O3 synthesized by the pulsed wire evaporation method

Nanoparticles of Fe2O3 with a mean particle size of 4–50 nm have been prepared by the pulsed wire evaporation method, and its structural and magnetic properties were studied. From the main peak intensity of x-ray diffraction the amount of v̥-Fe2O3 and ɑ-Fe2O3 in sample is composed about 70% and 30%,...

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Bibliographic Details
Published in:Journal of applied physics 2003-05, Vol.93 (10), p.7196-7198
Main Authors: Uhm, Y. R., Kim, W. W., Kim, S. J., Kim, C. S., Rhee, C. K.
Format: Article
Language:English
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Summary:Nanoparticles of Fe2O3 with a mean particle size of 4–50 nm have been prepared by the pulsed wire evaporation method, and its structural and magnetic properties were studied. From the main peak intensity of x-ray diffraction the amount of v̥-Fe2O3 and ɑ-Fe2O3 in sample is composed about 70% and 30%, respectively. The coercivity (53 Oe) and the saturation magnetization (14 emu/g) are about 20% of those of the bulk v̥-Fe2O3. A quadrupole line on the center of Mössbauer spectrum represents the superparamagnetic phase of v̥-Fe2O3 with a mean particle size of 7 nm or below.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.1558234