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Effects of Landau-Lifshitz-Gilbert damping on domain growth

机译:Landau-Lifshitz-Gilbert阻尼对领域生长的影响

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摘要

Domain patterns are simulated by the Landau-Lifshitz-Gilbert (LLG) equation with an easy-axis anisotropy. If the Gilbert damping is removed from the LLG equation, it merely describes the precession of magnetization with a ferromagnetic interaction. However, even without the damping, domains that look similar to those of scalar fields are formed, and they grow with time. It is demonstrated that the damping has no significant effects on domain growth laws and large-scale domain structure. In contrast, small-scale domain structure is affected by the damping. The difference in small-scale structure arises from energy dissipation due to the damping.
机译:域模式由Landau-Lifshitz-Gilbert(LLG)方程模拟,具有易轴各向异性。 如果从LLG方程中除去Gilbert阻尼,则它仅描述了具有铁磁相互作用的磁化的动力。 但是,即使没有阻尼,形成了类似于标量字段的域,它们随时间增长。 证明阻尼对领域生长法和大规模域结构没有显着影响。 相比之下,小规模域结构受阻尼的影响。 由于阻尼引起的小规模结构的差异来自于能量耗散。

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