高频交变磁场用三维/零维纳米复合多层软磁材料研究

FeSi/Cu, FeSi-ZrO2, FeSi-Al2O3, FeSi/FeSi-ZrO2 nanogranular and.nanomultilayer films were prepared by EB-PVD method. The microstructure and.magnetic and electrical properties have been investigated to study their application at high frequency operation.All the films prepared in this work have shown high saturation magnetization.and resistivity. The resisvity of FeSi/Cu nanomultilayers was even higher than that of Fe-6wt%Si materials, which was attributed mainly by the interfacial scattering in the.nanomultilayers.Nano-crystallization has been recognized for the FeSi-ceramic granular thin.films after vacuum annealing. The grain size of ?Fe(Si) was no morn than 20nm.and showed very good thermal stability. The saturation magnetization and.resistivity increased with increasing the ceramic content and showed a sharp rise at certain ceramic content. The maximum value of the resistivity was about 2279?穋m and saturation magnetization was about 93.1emu/g..In this work, it was obtained that the maximum values of the resistivity, the.saturation magnetization and pemeability of FeSi/(FeSi-ceramic) nano-multilayer.materials were about 1861.3?穋m, 186emu/g and 1.79x104, respectively. The coercivity was about 8.97Oe. The properties of the multilayer materials depenon the FeSi-ceramic nano-granular layer. The coercivity was also affected by thelayer interface and the microstructure of FeSi layer. It has been shown that,because of their high saturation magnetization and resistivity, the FeSi/(FeSi-ceramic) multilayer materials can be a promising candidate for magnetic cores working at high frequency operation.

采用电子束物理气相沉积方法，制备三维/零维FeSi/(FeSi-A1N)纳米复合多层软磁材料。研究FeSi-A1N层中零维纳米软磁颗粒在非磁性相中的分散特性及磁耦合、零维与三维纳米层的层间耦合、层内纳米晶粒度、层间距、层厚比对多层材料的软磁特性的影响规律。研制出用于高频交变磁场下工作的具有高饱和磁化强度及高电阻率的纳米复合多层软磁材料。