Development of high performance metallic magnetic core using new magnetic phenomenon

在nanostructured Fe-Cu-Nb-Si-B母phases中的一种高级退火。一个精确的水晶石在域墙中扮演了穿孔站点的角色，并减少了Ribbon的渗透性，接近300而没有磁性损失中的显著增加。开发的带状带的磁性损失是可以比较的，即Mn-Zn ferite和带有空气间隙的反常切割核心，而带状带的饱和磁化大约要比ferite高三次。在附加情况下，带状带的渗透性可以被调整到一个核心的准备值之后，进一步对磁性能的调查在直流-biased场中，如何，揭示了准备好的带状带的磁性损失明显地明显地低于直流-biased场中，而磁性旋转模式更适合在直流-biased场中减少磁性损失。因此，纳米结构化的Fe-Cu-Nb-Si-B带状带中的磁性变化也是由使用creep-inducuced的异向方法开发的，一个带有低损耗和低渗透性的无缺口磁性核心是由预先制备的带状带准备的。实际上，准备好的核心的磁性损失甚至在直流偏置字段下都没有增加;准备好的核心的饱和度大约在三次高的时候达到了铁质，并且在直流偏置字段下其渗透性的稳定性高于铁质核心。此外，核心的磁性损失为铁核心（100 kHz，0.1 T，在直流偏置场下）的三分之二。因此，所开发的核心被认为是为了应用于电子设备。

An excessive annealing of amorphous Fe-Cu-Nb-Si-B ribbons precipitated FeィイD22ィエD2B fine crystallites in the nanostructured Fe-Cu-Nb-Si-B mother phases. The precipitated crystallites played the role of pining sites of domain walls, and reduced the permeability of the ribbons down to approximately 300 without a significant increase in magnetic loss. The magnetic loss of the developed ribbons is comparable with that of Mn-Zn ferrite and an amorphous cut core with air-gaps, and the saturation magnetization of the ribbons is approximately three times as high as that of ferrite. In addition, the permeability of the ribbons can be adjusted to a desired value after preparation of a core.Further investigation on magnetic properties under a dc-biased field, however, revealed that the magnetic loss of the prepared ribbons increases significantly under a dc-biased field, and that the magnetization rotation mode is preferred for reducing magnetic loss under a dc-biased field. Thus, nanostructured Fe-Cu-Nb-Si-B ribbons in which the magnetization changes by its rotation were also developed by using the creep-induced anisotropy, and a gap-less magnetic core with low loss and low permeability was prepared from the prepared ribbon. Actually, the magnetic loss of the prepared core did not increase even under a dc-bias field.The saturation magnetization of the prepared core is approximately three times as high as that of ferrite, and the constancy of its permeability under a dc-bias field is superior than that of a ferrite core. In addition, the magnetic loss of the core is 2/3 of that of a ferrite core (100kHz, 0.1T, under a dc-bias field). Therefore, the developed core is considered to be applied to electronic devices.