Nanostructured fe - ni alloy have been particularly emphasized because of their high permeability , low coercive force and relatively high saturation magnetization . fe - ni alloy fiber were also used as wave - absorbing materials . fe - co , co - ni , fe - co - ni alloy were armphous soft magnetic materials 其中fe - ni合金是纤维状的非晶态的软磁材料， fe - co合金为球形， co - ni合金也是球形，相互联结成链状。
Fe - ni alloy fiber were first prepared in a mixed solution of ferrous and nickelous salts , using kbh4 as a reducing agent . conditions , such as quantity of naoh , concentration of salts , and species of surfactants , of preparation of fe - ni alloy were studied . the result show that fe - ni alloy were soft magnetic materials and they exhibited superparamagnetization at room temperature that have been widely used in industry 本文用液相还原法首次制备出纤维状的fe - ni合金、球形的fe - co 、 co - ni合金、 fe - co - ni合金粉体材料，并对其性能进行了分析和测试，结果表明：这些合金粒径小，比饱和磁化强度较大，矫顽力为零，呈现超顺磁性，是非晶态的软磁材料。
By successful solution of non - linear magnetic fields and revision of the program , we can reach following conclusions : in the computation of nonlinear magnetic fields , if iteration method is used , under - relaxation is necessary when amending the permeability distribution in soft magnetic materials ; and when < wp = 5 > calculating the equivalent current density in permanent magnets , under - relaxation is not a necessity ; when searching for permeability values by interpolation method on the demagnetization curve of soft magnetic materials , if a fixed saturation point is set , around this point an abrupt change of permeability values will be obtained ; this sudden change may cause a little problem in the smoothness of magnetic field distribution ; because the magnetic circuits of microwave tubes are too complicated , in the author ' s view , to describe the working state of a magnet system , the working points of magnets can not do it properly but average energy production of magnets will serve ; as to indicate the quality of a magnet system design for microwave tubes , the efficiency of magnetic energy utilization will be a very good criterion 由此得出结论，在非线性磁场计算中：采用迭代法的情况下，在各迭代循环之间进行磁导率修正时，一个欠松弛迭代过程是必需的；对永磁体中的等效电流修正时可以不作欠松弛迭代；在纯铁的磁化曲线上指定某一个固定的磁感应强度为磁饱和值，会使得插值求出的磁导率在该磁饱和值附近有一突变,这一突变对计算结果中磁场分布变化的光滑性稍有影响。在微波管磁系统设计中，由于微波管磁路比较复杂，作者认为磁体的工作点并不能很好地反映磁体的工作状态，而采用平均磁能积为衡量磁体工作状态的标准更加符合微波管磁系统的实际情况；要表示磁系统设计好坏的程度，则用磁能利用的效率为标准更好。
Firstly , basing on the knowledge of soft magnetic materials fabricated by the powder metallurgy ( mp ) , we brought forward a new ideal about the composite powder , which is to distribute brittle metal powders ( si ) to the surface and gaps of the plastic ones ( fe ) , then composite particles in which plastic metal powder is packaged by brittle ones are formed by further deformation 基于粉末冶金制备软磁材料的相关基础知识，我们首先提出一种全新的粉末复合思路，即将脆性金属粉末以不同粒度范围分布在塑性金属粉末的表面和间隙中，在进一步受应力变形时，形成塑性金属包裹脆性金属的复合包裹体。
Besides the simple control and relatively larger force by increasing the dimensions , one of the most important reasons for this is that the basic elements of the microactuators can be fabricated with ic - compatible micromachining technology , such as electroplating of ni - fe alloy , a soft magnetic material , and structuring of plane and three - dimensional coils by resist micromoulding and electroplating 最后，最为关键的是磁驱动的基本材料与微机械加工技术是相兼容的，它们可以采用微机械加工方法进行加工。光开关的切换可以通过悬臂梁下端的电磁铁线圈中的电流进行控制。
