Li-Zn-Cuフェライト多結晶体の感温性とFeのMn部分置換との関係

Li-Zn-Cu ferrite polycrystal as a high-frequency ferrite is distinguished by its temperature sensitivity. In a previous paper, we pointed out that Li-ferrite, the main component of Li-Zn-Cu ferrite causes the temperature sensitivity. This result would suggest the influence of the large temperature coefficient of the anisotropy constant of Li-ferrite. The purpose of the present work is to investigate the effect of partial Mn substitution of Fe on the temperature sensitivity of Li-Zn-Cu ferrite polycrystal. While the permeability and the saturation magnetization at room temperature were reduced with greater Mn substitution, their temperature dependences were enhanced. It was clarified that the stronger temperature dependence of the apparent anisotropy field arose from partial Mn substitution and thereby intensified the temperature-dependent magnetic properties.