THE EFFECT OF VACANCIES ON SOME MAGNETIC PROPERTIES OF IRON - DEFICIT (NiO)x(ZnO)y(Fe2O3)z SYSTEM

Authors

  • Noorhana Yahya Institute of Advance Technology (IAT), Physics Department, Faculty of Science and Environmental Studies, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor Author
  • M. Hashim Institute of Advance Technology (IAT), Physics Department, Faculty of Science and Environmental Studies, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor Author
  • R.S. Azis Author
  • Zolman Hari Department of Engineering Science and Mathematics , Engineering College, Universiti Tenaga Nasional (UNITEN), Km7, Jalan Kajang-Puchong, 43009 Kajang,Selangor Author
  • N.M. Saiden Author
  • R. Alias Author
  • A. Magen Author

Abstract

The effect of iron deficiency of Ni0.30+2XZn0.70Fe2-2XO4-4X with X = 0.00, 0.01, 0.02, 0.03 and 0.04 were carefully studied. High purity (99.992%) starting oxides were used and toroidal samples were prepared by using a conventional oxide-mixing technique. X-Ray Diffraction analysis of the iron deficit samples identified single phase ferrite. Grain size of 31.8µm and lowest theoretical porosity, 0.78%, for sample with 0.47 mole fraction of iron oxide was obtained. It is speculated that cationic and anionic vacancies are sufficiently formed for the diffusive transportation of metal ions to occur for the sample. However, sample with 0.46 mole fraction of iron oxide gave the highest saturation induction, 2757 Gauss as well as highest Curie temperature (5000C) due to stronger superexchange interaction.

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Published

16-03-2026

Issue

Vol. 12 No. 1 (2004): Solid State Science and Technology

Section

Articles

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.