Title: Structure and magnetic properties of mechanically milled Pb3O4-Fe2O3 mixture

Authors: Ahmed M. Al-Saie, Adnan Jaafar, Mohamed Bououdina

Addresses: Nanotechnology Centre, University of Bahrain, Sakhir Campus, P.O. Box 32038, Kingdom of Bahrain; Department of Physics, College of Science, University of Bahrain, Sakhir Campus, P.O. Box 32038, Kingdom of Bahrain. ' Department of Physics, College of Science, University of Bahrain, Sakhir Campus, P.O. Box 32038, Kingdom of Bahrain. ' Nanotechnology Centre, University of Bahrain, Sakhir Campus, P.O. Box 32038, Kingdom of Bahrain; Department of Physics, College of Science, University of Bahrain, Sakhir Campus, P.O. Box 32038, Kingdom of Bahrain

Abstract: A mixture of Fe2O3 and Pb3O4 oxides has been mechanically milled to form the nanosized spinel PbFe2O4 phase. X-ray diffraction pattern of the as milled mixture shows the presence of Fe2O3 peaks in addition to a broad halo around 29° related to the amorphisation of Pb3O4. Annealing at 750°C for 1 h, leads to the formation of new phases as evidenced by the appearance of new peaks. The saturation magnetisation and coercivity values of the as-milled mixture are 1.03 emu/g and 200 Oe, respectively. After annealing, a paramagnetic behaviour with a large hysteresis loop was observed.

Keywords: hexaferrite; mechanical milling; nanoparticles; X-ray diffraction; magnetic properties; nanotechnology; saturation magnetisation; coercivity values; hysteresis loop.

DOI: 10.1504/IJNP.2011.038248

International Journal of Nanoparticles, 2011 Vol.4 No.1, pp.20 - 26

Published online: 13 Mar 2015 *

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