Electro-Magnetic Properties of Mn-Zn Ferrite Single Crystal with Small Variation of <TEX>$Fe_2O_3$</TEX> Concentration

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J. Korean Ceram. Soc. > Volume 30(10); 1993 > Article

Journal of the Korean Ceramic Society 1993;30(10): 791.

$Fe_2O_3$ 미량 변화에 따른 Mn-Zn 페라이트 단결정의 전자기적 특성

제해준, 변순천, 홍국선, 장성도

한국과학기술연구원 세라믹스공정연구실

Electro-Magnetic Properties of Mn-Zn Ferrite Single Crystal with Small Variation of $Fe_2O_3$ Concentration

ABSTRACT

The electro-magnetic properties of the Mn-Zn ferrite single crystal with small variation of Fe2O3 concentration at the high permeability composition, 53mol% Fe2O3-28.5mol% MnO-18.5mol% ZnO, have been studied for the VCR magnetic head application. With the increase of the Fe2O3 concentration, the Fe2+ concentration increased, the specific resistivity decreased, the secondary maximum permeability shifted to the lower temperature, and the initial permeability decreased. It was concluded that the small variation of $pm$0.5mol% Fe2O3 concentration greatly affected the electro-magnetic properties of Mn-Zn ferrite single crystals. At the composition of 53mol% Fe2O3, the initial permeability was comparatively high (650 at 5MHz) and its temperature dependence was small.