According to simplifying rule of force system,the force suffered by a coil carrying current in magnetic field,can be summed up to a resultant of magnetic forces and a total moment of magnetic force.

Using vector algebra and vector field theory, we calculated the total moment of magnetic force acted on a coil carrying current in uniform magnetic field.

Research progress of properties for glass-coated magnetic alloy microwires;

Permeability-frequency spectra of (Fe_(0.2)Co_(0.8))_(76.9)Cu_(0.6)Nb_(2.5)Si_(11)B_9 soft magnetic alloy under different heat treatment conditions;

The development includes the new theory of composition design of high permeability permalloy,the development of reducing the cost of permalloy through replace high-Ni-alloy by low one,the study of the new wafer core materials used as stereo magnetic head,and the development of iron-loss analysis of the soft magnetic alloy.

High magnetic losses soft magnetic alloy composites material(SCM)used for electromagnetic interference suppression was fabricated by magnetic core preparation method.

Research on a ductile permanent magnet alloy Cu_(80)Ni_(13)Fe_7;

The traditional casting mold used for permanent magnet alloy was improved.

This paper sums up the smelting method,composition adjustion method,calculating formuld,determining and calculating of relative coefficients,etc,of FeAlC permanent magnet alloy,puts forward also their using method in the production process of FeAlC permanent magnet alloy.