Numerical analysis of the Landau-Lifshitz-Gilbert equation with inertial effects
Numerical analysis of the Landau-Lifshitz-Gilbert equation with inertial effects
复制标题
具有惯性效应的 Landau-Lifshitz-Gilbert 方程的数值分析
DOI:
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发表时间:
2021
期刊:
影响因子:
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通讯作者:
M. Ruggeri
中科院分区:
文献类型:
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作者:
M. Ruggeri
We consider the numerical approximation of the inertial Landau-Lifshitz-Gilbert equation (iLLG), which describes the dynamics of the magnetization in ferromagnetic materials at subpicosecond time scales. We propose and analyze two fully discrete numerical schemes: The first method is based on a reformulation of the problem as a linear constrained variational formulation for the linear velocity. The second method exploits a reformulation of the problem as a first order system in time for the magnetization and the angular momentum. Both schemes are implicit, based on first-order finite elements, and generate approximations satisfying the unit-length constraint of iLLG at the vertices of the underlying mesh. For both methods, we prove convergence of the approximations towards a weak solution of the problem. Numerical experiments validate the theoretical results and show the applicability of the methods for the simulation of ultrafast magnetic processes.
DOI:
10.48550/arxiv.1712.03795
发表时间:
2017
期刊:
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影响因子:
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作者:
Hrkac G
通讯作者:
Hrkac G
影响因子:
3.2
作者:
Walowski, Jakob;Muenzenberg, Markus
通讯作者:
Muenzenberg, Markus
DOI:
10.48550/arxiv.1402.0983
发表时间:
2014
期刊:
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影响因子:
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作者:
Abert C
通讯作者:
Abert C