Micromagnetic simulation of magnetic domain structures evolution of FeGa alloys by phase-field method

Publication date: February 2020Source: Materials Science and Engineering: B, Volume 252Author(s): Yanli Lu, Runan Guo, Tinghui Zhang, Zheng ChenAbstractThe 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.Graphical abstract
Source: Materials Science and Engineering: B - Category: Materials Science Source Type: research