Effect of dopants on the magnetic properties of MnZn ferrites for high frequency power supplies

The effect of additions on the magnetic properties of MnZn ferrites for high frequency power supplies was studied. The investigation revealed that various combinations of dopants added to the ferrite modify the grain boundary resistivity and the magnetic permeability spectra at constant microstructu...

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Veröffentlicht in:	IEEE Transactions on Magnetics 1995-03, Vol.31 (2), p.950-953
Hauptverfasser:	Znidarsic, A., Limpel, M., Drofenik, M.
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: electronic structure, electrical, magnetic, and optical properties Conductivity DOPED MATERIALS Electric resistance Electrical resistance measurement Exact sciences and technology EXPERIMENTAL DATA Fe and its alloys FERRITES Frequency Grain boundaries MAGNETIC PROPERTIES Magnetic properties and materials MANGANESE COMPOUNDS MATERIALS SCIENCE METALLURGICAL EFFECTS Permeability Physics POWER SUPPLIES POWER TRANSMISSION AND DISTRIBUTION Studies of specific magnetic materials Switched-mode power supply TANTALUM OXIDES TIN OXIDES TITANIUM OXIDES TRANSFORMERS ZINC COMPOUNDS
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Zusammenfassung:	The effect of additions on the magnetic properties of MnZn ferrites for high frequency power supplies was studied. The investigation revealed that various combinations of dopants added to the ferrite modify the grain boundary resistivity and the magnetic permeability spectra at constant microstructure. Particularly, the combined effect of Sn/sup 4+/, Ti/sup 4+/ and Ta/sup 5+/ was found to increase the grain boundary resistivity in the ferrites studied and remarkably decrease the power loss at higher frequencies.< >
ISSN:	0018-9464 1941-0069
DOI:	10.1109/20.364767