Proposal of a micromagnetic standard problem for ferromagnetic resonance simulations
| Autor: | Chun Lian Hu, Marc Antonio Bisotti, Weiwei Wang, Hans Fangohr, Shilei Zhang, Marijan Beg, Thorsten Hesjedal, Matteo Franchin, Robert Stamps, Gregory Ashton, Alexander A. Baker, Maximilian Albert, Dmitri Chernyshenko |
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| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Permalloy Physics Magnetization dynamics Condensed matter physics Condensed Matter - Mesoscale and Nanoscale Physics Numerical analysis Finite difference FOS: Physical sciences Condensed Matter Physics 01 natural sciences Ferromagnetic resonance Resonance (particle physics) Finite element method Electronic Optical and Magnetic Materials symbols.namesake Fourier transform Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 0103 physical sciences symbols Statistical physics 010306 general physics |
| Popis: | 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 \textsf{OOMMF} and \textsf{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. |
| Databáze: | OpenAIRE |
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