Facultatea de Fizică
Universitatea "Al.I.Cuza" Iaşi
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| Titlu: Modeling the complex permeability spectra of NiZnCo ferrite |
| Autori: Anca Pădurau, Ovidiu Florin Călţun |
| Afiliere: Universitatea „Al. I. Cuza“, Facultatea de Fizică, 6600 Iaşi |
| Abstract: Microstructure and magnetic properties of NiZnCo ferrite are highly sensitive to the preparation methodology, sintering conditions and the amount of constituent metal oxides, impurities or doping levels. Efforts are being made to develop a low-power loss material operating in the MHz region in accordance with the miniaturization of cores. The studies on microstructure and composition related magnetic properties have been reported for Ni-Zn ferrites by several researchers in this field [1]-[3]. Nakamura [4] has reported the low-temperature sintering of Ni-Zn ferrite at 9000C resulting in magnetic permeability over 200 at 1MHz and density greater than 4.5gcm-3. The high permeability has been attributed to the domain wall contribution, which is controlled not only by the higher post sintering density but also by increased grain. The addition increases the density and decreases the sintering temperature and increases the resistivity of the material. |
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