期刊
MODERN PHYSICS LETTERS B
卷 24, 期 2, 页码 169-182出版社
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0217984910022214
关键词
Mg-Cu-Zn ferrites; microstructure; complex permeability
资金
- Prime Minister's Research and Higher Studies Assistance fund of the People's Republic of Bangladesh
The microstructure and magnetic properties of Mg-Cu-Zn ferrites prepared by using olid-state reaction method have been investigated. X-ray diffraction (XRD), a scanning electron microscope (SEM), impedance analyzer and a vibrating sample magnetometer (VSM) were utilized in order to study the effect of copper substitution and its impact on the crystal structure,grain size,microstructure and magnetic properties of the Mg-Cu-Zn ferrite. The formation of cubic spinel phase was identified using XRD technique. The microstructures of the samples show that the grain growth is greatly enhanced by the addition of CuO which is attributed to the liquid phase during sintering. The average grain size (D-m) increases significantly with increasing Cu content. The initial permeability (mu') of the samples increases appreciably with increasing Cu content which is attributed to the increase of grain size and density of the samples. The resonance frequency (f(r)) of the samples shifts toward the lower frequency as the Cu content increases. The sharp fall of mu' in mu'-T curves is observed for all the samples which indicate the homogeneity of the samples. The saturation magnetization (M-s) of the Mg-Cu-Zn ferrites increases slightly with increasing Cu concentration.
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