Micromagnetic Modeling on self-assembled iron nanostructures

Abstract

Abstract. Single-crystalline Fe dots self-assembled under ultra high vacuum (UHV) are used as a model system to discuss micromagnetic properties of sub-micron size magnetic dots. Landau and diamond states were identified by magnetic force microscopy (MFM) and reproduced by simulations.To understand mechanisms involved in the magnetization reversal, the in-plane angular variations of nucleation and annihilation fields of a multi-domain magnetic single dot with a micro-SQUID were studied. Résumé. Desîlots de fer auto-assemblés obtenus sous ultravide (UHV

Mathematical models in micromagnetism: an introduction

“…This paper is an introduction to the topics presented in [3,8,9]. We have described the models used for analysis and numerical simulations of ferromagnetic materials.…”

“…We have described the models used for analysis and numerical simulations of ferromagnetic materials. Both static configurations and dynamic evolutions of solutions are adressed and we refer the reader to [9], [8] and [3] for more precise applications respectively for static equilibrium configurations, numerical computations issues and the computation of susceptibility response of 3-dimensional magnetic object.…”

“…The complete justification of van den Berg's construction from the three-dimensional model is not fully understood although it has been thoroughly studied (see [6] for a recent review of this subject among others). This construction is one of the key arguments of [9]. Moreover, the numerical computation of the stray field induced by a magnetization distribution is by no means obvious.…”

“…Nonetheless, finding algorithms suitable for the numerical computations of equilibrium configurations solutions of (3) is difficult. In [9] is given one of the possible methods while the reader is refered to [1] for the description of a finite element method on this problem.…”