Proposal of a micromagnetic standard problem for ferromagnetic resonance simulations

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:421

Article

Baker, Alexander¹  Beg, Marijan²  Ashton, Gregory²  Albert, Maximilian²  Chernyshenko, Dmitri²  Wang, Weiwei³  Zhang, Shilei¹  Bisotti, Marc-Antonio²  Franchin, Matteo²  Hu, Chun Lian⁴  Stamps, Robert⁴  Hesjedal, Thorsten¹  Fangohr, Hans² 

[1] Univ Oxford, Clarendon Lab, Dept Phys, Oxford 3PU OX1, England

[2] Univ Southampton, Fac Engn & Environm, Southampton SO17 1BJ, Hants, England

[3] Ningbo Univ, Dept Phys, Ningbo 315211, Zhejiang, Peoples R China

[4] Univ Glasgow, SUPA Sch Phys & Astron, Glasgow G12 8QQ, Lanark, Scotland

关键词: Ferromagnetic resonance;    Micromagnetic simulations;    Micromagnetic standard problem;   

DOI  :  10.1016/j.jmmm.2016.08.009

来源: Elsevier

【 摘 要 】

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.

【 授权许可】

Free