A systematic approach to multiphysics extensions of finite-element-based micromagnetic simulations: Nmag

Fischbacher, T., Franchin, M., Bordignon, G. and Fangohr, H. (2007) A systematic approach to multiphysics extensions of finite-element-based micromagnetic simulations: Nmag. IEEE Transactions on Magnetics, 43, (6), 2896-2898. (doi:10.1109/TMAG.2007.893843).


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Original Publication URL: http://dx.doi.org/10.1109/TMAG.2007.893843


Extensions of the basic micromagnetic model that include effects such as spin-current interaction, diffusion of thermal energy or anisotropic magnetoresistance are often studied by performing simulations that use case-specific ad-hoc extensions of widely used software packages such as OOMMF or Magpar. We present the novel software framework 'Nmag' that handles specifications of micromagnetic systems at a sufficiently abstract level to enable users with little programming experience to automatically translate a description of a large class of dynamical multifield equations plus a description of the system's geometry into a working simulation. Conceptually, this is a step towards a higher-level abstract notation for classical multifield mutliphysics simulations, similar to the change from assembly language to a higher level human-and-machine-readable formula notation for mathematical terms (FORTRAN) half a century ago. We demonstrate the capability of this appraoch through two ecamples, showing 1) a reduced dimensionality model coupling two copies of the micromagnetic sector and 2) the computation of a spatial current density distribution for anisotropic magnetoresistance (AMR). For cross-wise validation purposes, we also show how Nmag compares to the OOMMF and Magpar packages on a selected micromagnetic toy system. We furthermore, briefly discuss the limiations of our framework and related conceptual questions.

Item Type: Article
ISSNs: 0018-9464 (print)
Related URLs:
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Q Science > QA Mathematics > QA76 Computer software
Divisions: University Structure - Pre August 2011 > School of Engineering Sciences > Computational Engineering and Design
ePrint ID: 46725
Date Deposited: 17 Jul 2007
Last Modified: 28 Mar 2014 15:09
Computational Modelling of Three-Dimensional Magnetic Nanostructures
Funded by: EPSRC (GR/T09156/01)
1 May 2005 to 31 October 2007
URI: http://eprints.soton.ac.uk/id/eprint/46725

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