Ferromagnetic Materials for MEMS- and NEMS-Devices

A. Weddemann, J. Jadidian, S. Khushrushahi, Y. Kim, and M. Zahn
Research Laboratory of Electronics
Massachusetts Institute of Technology
Cambridge MA

The modeling of ferromagnetic materials is a challenging task of high industrial and academic impact. Thin film and granular systems form the basis of novel spintronic devices such as modern hard drives with a high data area storage density. In order to push the current limits even further and to design more efficient devices, a strong understanding of the governing dynamics is required.

We implement the governing equations into COMSOL Multiphysics and discuss different simplifications for arrays of two-dimensional thin film systems (magnetoresistive devices) and assemblies of zero-dimensional magnetic moments (superparamagnetic nanoparticles).