Proposal of a micromagnetic standard problem for ferromagnetic resonance simulations
Proposal of a micromagnetic standard problem for ferromagnetic resonance simulations
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DOI：
10.1016/j.jmmm.2016.08.009
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发表时间：
2017-01-01
影响因子：
2.7
通讯作者：
Fangohr, Hans
中科院分区：
文献类型：
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作者：
Baker, Alexander;Beg, Marijan;Fangohr, Hans
目前，微磁模拟是研究包括铁磁共振在内的各种不同磁现象的常用工具。一种评估不同微磁仿真工具的可靠性和有效性的技术是对所提出的标准问题的仿真。我们提出了一个新的标准问题，通过提供一个足够简单的问题的详细说明和分析。通过分析坡莫合金方形薄样品在明确激励下的磁化动力学，得到了其铁磁共振谱，并通过傅里叶变换确定了其共振模式。分别使用OOMMF和Nmag模拟器，采用有限差分和有限元数值方法进行了仿真。我们报告了初始条件和模拟参数对该标准问题观测到的共振模态特征的影响。我们提供了详细的说明和代码，以协助使用新的模拟器工具的评估结果，并帮助铁磁共振谱和模式的数值计算。(C) 2016 Elsevier B.V.版权所有
Nowadays, micromagnetic simulations are a common tool for studying a wide range of different magnetic phenomena, including the ferromagnetic resonance. A technique for evaluating reliability and validity of different micromagnetic simulation tools is the simulation of proposed standard problems. We propose a new standard problem by providing a detailed specification and analysis of a sufficiently simple problem. By analyzing the magnetization dynamics in a thin permalloy square sample, triggered by a well defined excitation, we obtain the ferromagnetic resonance spectrum and identify the resonance modes via Fourier transform. Simulations are performed using both finite difference and finite element numerical methods, with OOMMF and Nmag simulators, respectively. We report the effects of initial conditions and simulation parameters on the character of the observed resonance modes for this standard problem. We provide detailed instructions and code to assist in using the results for evaluation of new simulator tools, and to help with numerical calculation of ferromagnetic resonance spectra and modes in general. (C) 2016 Elsevier B.V. All rights reserved.