磁偶极相互作用对软磁材料的性能调制研究

The dipole interaction in soft magnetic materials can affect the magnetic properties its practical application as sensing elements. Hence, it has significant value to figure out the mechanism and crucial factors of the dipole interaction to ameliorate the performance of magnetic sensors. In this project, we will prepare different types of magnetic materials by using various preparation technologies. Then, optimized soft magnetic materials can be obtained after suitable heat treatment. The dependence of geometric structure of multilayer films and multiple microwires on the dipole interaction, magnetic properties of the materials and the sensing performance will be studied. To reveal the mechanism and influence of the dipole interaction, micromagnetics simulation will be employed to investigate the magnetic properties of multilayer films or multi microwires under external magnetic field by combining analytical and numerical methods. The research results will provide reliable theoretical foundation and technical parameters to design the weak magnetic sensors.

软磁材料间的偶极相互作用会调制材料本身的磁性能，进而影响其作为弱磁传感器敏感元件的实际应用，弄清偶极相互作用的机理和影响要素对实际材料结构设计非常有意义。本项目将综合利用多种手段设计制备不同结构软磁材料，通过适当热处理优化材料磁性能，探讨多层膜膜层结构、多根丝结构参数对偶极相互作用、材料磁性能及传感性能影响；利用微磁学模拟手段，采用解析与数值计算相结合的方法，模拟多层膜或者多根丝在外磁场下的磁学性质，研究软磁材料各向异性、几何结构对偶极相互作用和反磁化过程的影响，探讨软磁材料偶极相互作用的影响因素，为实际设计实用化弱磁传感器敏感元件结构提供可靠的技术参数和理论依据。

软磁材料间的偶极相互作用会调制材料本身的磁性能，进而影响其作为弱磁传感器敏感元件的实际应用，弄清偶极相互作用的机理和影响要素对实际材料结构设计非常有意义。本项目利用熔融快淬拉丝法磁控溅射和化学气相沉积法等多种手段设计制备了基于Fe基纳米晶条带的复合结构软磁材料，通过适当热处理优化材料磁性能，利用VSM和GMI等表征手段，结合微磁学手段探讨研究膜层结构等参数对交换耦合和偶极相互作用的影响，利用GMI分离了两种相互作用。利用偶极相互作用分析了生物磁敏检测的机理，为进一步拓宽GMI的应用提供了可靠的技术参数和理论依据。