Parallel arrangement

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Parallel arrangement

In order to study the interaction between the particles, two simple configurations have been chosen.

First, two particles with parallel long axes and a gap of 2.5 nm have been simulated. Their interaction is caused by magnetic stray fields. The hybrid finite element / boundary element method, which has been used in all simulations, made it possible to restrict the finite element mesh to the magnetic particles. Thus, it was not necessary to create a finite element mesh in the surrounding space. A mesh only on the surface of the particles was used by the boundary element method to calculate the demagnetizing fields.

**Figure 6:** Finite element meshes and grain distribution of *hex_H*
$\begin{figure} \centering \subfigure[Coarse mesh ({\sf hex\_Hm1})]{ \includegr... ...\sf hex\_Hm2})]{ \includegraphics[scale=0.31]{fig/inthexf.fe.eps} }\end{figure}$

**Figure 7:** Cut planes of the easy axes, remanent, and coercive state plots of *hex_H*
$\begin{figure} \centering \includegraphics[scale=0.4]{fig/inthexf.cut.eps}\end{figure}$

**Figure 8:** Easy axes of *hex_H*
$\begin{figure} \centering \subfigure[Front cut plane]{ \includegraphics[scale... ...ack cut plane]{ \includegraphics[scale=0.3]{fig/inthexf.ani2.eps} }\end{figure}$

Werner Scholz
1/30/1999