Synthesis and Charaterization of Magnesium Zinc Ferrites as Electromagnetic Source
Noorhana Yahya, Ami Salwani Mohamad Nor Aripin, Azizuddin A. Aziz, Hanita Daud, Hasnah Mohd Zaid, Lim Kean Pah and Norehan Maarof
DOI : 10.3844/ajeassp.2008.53.56
American Journal of Engineering and Applied Sciences
Volume 1, Issue 1
Fabrication of Mg1-XZnXFe2O4 (where x = 0.2, 0.3, 0.4 and 0.5) samples using a conventional technique is reported. Oxides of magnesium, zinc and iron with purity of about 99.99% were mixed with distilled water in a milling machine for 12 hours. They were then filtered and presintered at 1250Â°C and sintered at 1350Â°C for 10 h in air. The phase and the crystal structure of the asprepared samples were identified using X-Ray Diffraction analysis (XRD). Hysteresis graph was evaluated using Vibrating Sample Magnetometer (VSM) to get the saturation magnetization (emu gâ1) and coercivity (G) value. Atomic Force Microscope (AFM) was used to observe the surface morphology. The X-ray diffraction analysis showed major peak at plane (3 1 1) of the cubic structure for all the ferrites. The largest value of density achieved was 4.69 gcmâ3 which was exhibited by sample with 0.5 mole fraction of zinc content. Highest saturation magnetization value (3.652emu gâ1) was obtained for the 0.3 mole fraction of zinc content. A strong correlation between the saturation magnetization and zinc content was observed. We speculate that it is due to the Heisenberg superexchange interaction of magnetic Fe3+ and non-magnetic Zn2+ occupying the tetrahedral sites. The sample was used to induce electromagnetic (EM) waves in high operating frequency (5 MHz).
© 2008 Noorhana Yahya, Ami Salwani Mohamad Nor Aripin, Azizuddin A. Aziz, Hanita Daud, Hasnah Mohd Zaid, Lim Kean Pah and Norehan Maarof. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.