Dresden 2017 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 41: Micromagnetism / Computational Magnetics

MA 41.4: Vortrag

Mittwoch, 22. März 2017, 15:45–16:00, HSZ 101

Control of magnetization reversal in ferromagnetic coaxial nanorods: micromagnetic simulations — •Irene Iglesias1, Thomas Feggeler1, Benjamin Zingsem1, and Michael Farle1,21Faculty of Physics and Center for Nanointegration (CENIDE), University Duisburg-Essen, Lotharstr. 1, 47057 Duisburg — 2Center of Functionalized Magnetic Materials, Immanuel Kant Baltic Federal University, 236041 Kaliningrad, Russian Federation

We present the results of micromagnetic simulations on the magnetization reversal in ferromagnetic coaxial nanorods consisting of different ferromagnetic materials in the inner wire and outer dia- and ferromagnetic tubular shells. To make our simulations compatible with real nanorods (typical length 200 nm and diameter 50 nm) that can be obtained by means of colloidal chemistry three main morphologies of coaxial nanorods have been selected: coaxial cylinders, coaxial ellipsoids and coaxial nanobones. Parameters were chosen such that two state magnetic switching was obtained and the arrangement of magnetic moments during the magnetization reversal was analyzed. The magnetic field was applied along the nanorods axis for all simulations. It is shown that the magnetization dynamics of ferromagnetic coaxial nanorods can be controlled by tuning their thickness, length and composition. The results of our studies may allow the enhanced control of magnetization reversal in coaxial structures, increasing their potential for biological applications and as information carriers in storage devices.

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