Finite volume element method for Landau-Lifshitz equation
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| Main Authors: | , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866917500701114368 |
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| author | Gong, Yunjie Chen, Jingrun Du, Rui Li, Panchi |
| author_facet | Gong, Yunjie Chen, Jingrun Du, Rui Li, Panchi |
| contents | The Landau-Lifshitz equation describes the dynamics of magnetization in ferromagnetic materials. Due to the essential nonlinearity and nonconvex constraint, it is typically solved numerically. In this paper, we developed a finite volume element method (FVEM) with the Gauss-Seidel projection method (GSPM) for the micromagnetics simulations. We provide the approximation error in space and depict the energy law when the FVEM is adopted. Owing to the GSPM for time-marching, the discrete system is decoupled component by component, making the computational complexity comparable to that of solving the scalar heat equation implicitly. This significantly accelerates real simulations. We present several numerical experiments to validate the theoretical analysis and the efficiency gain. Additionally, we study the blow-up solution and efficiently simulate the 2D magnetic textures using the proposed method. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_04871 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Finite volume element method for Landau-Lifshitz equation Gong, Yunjie Chen, Jingrun Du, Rui Li, Panchi Numerical Analysis Analysis of PDEs 35K51 G.1.8 The Landau-Lifshitz equation describes the dynamics of magnetization in ferromagnetic materials. Due to the essential nonlinearity and nonconvex constraint, it is typically solved numerically. In this paper, we developed a finite volume element method (FVEM) with the Gauss-Seidel projection method (GSPM) for the micromagnetics simulations. We provide the approximation error in space and depict the energy law when the FVEM is adopted. Owing to the GSPM for time-marching, the discrete system is decoupled component by component, making the computational complexity comparable to that of solving the scalar heat equation implicitly. This significantly accelerates real simulations. We present several numerical experiments to validate the theoretical analysis and the efficiency gain. Additionally, we study the blow-up solution and efficiently simulate the 2D magnetic textures using the proposed method. |
| title | Finite volume element method for Landau-Lifshitz equation |
| topic | Numerical Analysis Analysis of PDEs 35K51 G.1.8 |
| url | https://arxiv.org/abs/2502.04871 |