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Complex Permeability and Dielectric Behaviors of Eu3+ Doped Ni-Zn Ferrites

M. A. Hossain, M. N. I. Khan and S. S. Sikder
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M. A. Hossain: Department of Physics Khulna University of Engineering& Technology (KUET), Bangladesh
M. N. I. Khan: Material Science Division, Bangladesh Atomic Energy Center, Bangladesh
S. S. Sikder: Department of Physics Khulna University of Engineering& Technology (KUET), Bangladesh

Journal of Asian Scientific Research, 2018, vol. 8, issue 1, 21-29

Abstract: The present work is focused on the influence of substitutions rare earth europium ions (Eu3+) in soft poly crystalline Ni-Zn ferrites. A series of ferrite samples of the compositions Ni0.60Zn0.35Eu0.05Fe2O4, Ni0.60Zn0.30Eu0.10Fe2O4 and Ni0.60Zn0.25Eu0.15Fe2O4 were prepared by using double sintering solid state reaction technique. The pre-sintering and sintering were performed at temperature 10000C for 3 hours and 12500C respectively. The phase identification was carried out by using the X-ray diffraction (XRD). The XRD analysis revealed that undoped rare earth in sample shows formulation of cubic spinel structure with no extra peak but Eu3+ doped samples show additional peaks other spinel structure and corresponding to a second orthoferrite phase. A slightly increase in bulk density has been found with increasing RE content. The average grain size increases significantly with increasing Eu3+ content. The increase in density and grain growth of the samples may be attributed to the liquid phase at constant sintering temperature. Saturation magnetization, Ms was observed and was found to increase with increasing, Eu3+ contents. Eu3+ substitution in the Ni-Zn ferrites leads to increase of Fe3+ ions on the B-sites and consequently decreases Fe3+ ions on A-sites which lead to the increase in saturation magnetizations. The change of Ms with the augmentation of Eu3+ substitution has been explained on the Neel?s Collinear two sublattices magnetization model and Yafet-Kittels? non-collinear magnetization model. It is observed that addition of the rare earth europium ions (Eu3+) in polycrystalline Ni-Zn rare earth ferrites play an important role in modification of structural and magnetization characteristics.

Keywords: Solid state reaction technique; XRD; Permeability; Q-factor; Orthoferrite phase; Scanning electron microscope (SEM). (search for similar items in EconPapers)
Date: 2018
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