The stabilization of magnetic domains and their temporal evolution in FeGa alloys are predicted by combining micromagnetic model with phase-field method in this paper. The total free energy includes magnetocrystalline anisotropy energy, exchange energy, magnetostatic energy, external field energy and elastic energy. Under the diverse magnetic fields, domain structures are various because of the different total free energy and magnetization processes. The results show that when magnetic field direction along [1 0 0], with different magnetic strength, the directions of magnetization vectors all parallel to the magnetic field direction and the magnetized area forms a single domain structure eventually. When the magnetic field along [1 1 1] direction, the magnetic domains form striped domains. The direction and strength of magnetic field can effectively control the structures of magnetic domains. The total free energy increases with the increase of magnetic field strength and evolutionary steps. The system is stable with the stabilization of total free energy.

通过将微磁模型与相场方法相结合，预测了FeGa合金中磁畴的稳定及其随时间的演化。总自由能包括磁晶各向异性能，交换能，静磁能，外场能和弹性能。在不同的磁场下，由于不同的总自由能和磁化过程，畴结构是多种多样的。结果表明，当磁场方向沿[1 0 0]方向变化时，具有不同的磁场强度时，磁化矢量的方向全部与磁场方向和磁化区域平行，最终形成一个单畴结构。当磁场沿着[1 1 1]方向时，磁畴形成条状畴。磁场的方向和强度可以有效地控制磁畴的结构。总自由能随磁场强度和演化步伐的增加而增加。系统具有稳定的总自由能。