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arXiv · 1109.4075

Magnetic nanocomposites: new methodology for micromagnetic modeling and SANS experiments

Sergey Erokhin·Dmitry Berkov·Nataliya Gorn·Andreas Michels
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Abstract

A new methodology for micromagnetic simulations of magnetic nanocomposites is presented. The methodology is especially suitable for simulations of two-phase composites consisting of magnetically hard inclusions in a soft magnetic matrix phase. The proposed technique allows to avoid the unnecessary discretization of the 'hard' inclusions (these are normally in a single-domain state), but enables an arbitrary fine discretization of the 'soft' phase. The method is applied to the determination of the equilibrium magnetization state of an iron-based nanocomposite from the Nanoperm (FeZrBCu) family of alloys and to the calculation of the corresponding small-angle neutron scattering (SANS) cross-section. For this highly interesting material, the results of our simulations exhibit a remarkable agreement with the nontrivial 'clover-leaf' SANS cross-sections observed experimentally (A. Michels et al., Phys. Rev. B, v. 74, 134407 (2006)).

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Sergey Erokhin, Dmitry Berkov, Nataliya Gorn, Andreas Michels. 2011-09-19. Magnetic nanocomposites: new methodology for micromagnetic modeling and SANS experiments. https://arxiv.org/abs/1109.4075

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