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Article Dans Une Revue Journal of Physics: Condensed Matter Année : 2013

Energy levels of interacting curved nano-magnets in a frustrated geometry: increasing accuracy when using finite difference methods

Hanna Riahi
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  • IdRef : 178170429
François Montaigne
Nicolas Rougemaille
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  • PersonId : 951387
Benjamin Canals
Daniel Lacour
Michel Hehn

Résumé

The accuracy of finite difference methods is related to the mesh choice and cell size. Concerning the micromagnetism of nano-objects, we show here that discretization issues can drastically affect the symmetry of the problem and therefore the resulting computed properties of lattices of interacting curved nanomagnets. In this paper, we detail these effects for the multiaxe kagome lattice. Using the Oommf finite difference method, we propose an alternative way of discretizing the nanomagnet shape via a variable moment per cell scheme. This method is shown to be efficient in reducing discretization effects.

Dates et versions

hal-00934439 , version 1 (22-01-2014)

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Citer

Hanna Riahi, François Montaigne, Nicolas Rougemaille, Benjamin Canals, Daniel Lacour, et al.. Energy levels of interacting curved nano-magnets in a frustrated geometry: increasing accuracy when using finite difference methods. Journal of Physics: Condensed Matter, 2013, 25 (29), pp.296001. ⟨10.1088/0953-8984/25/29/296001⟩. ⟨hal-00934439⟩
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