Controllable switching of vortex chirality in magnetic nanodisks by a field pulse

Gaididei, Yuri; Sheka, Denis D.; Mertens, Franz G.

Controllable switching of vortex chirality in magnetic nanodisks by a field pulse

Authors

Gaididei, Yuri

Sheka, Denis D.

Mertens, Franz G.

Description

We propose a way of fast switching the chirality in a magnetic nanodisk by applying a field pulse. To break the symmetry with respect to clockwise or counterclockwise chirality a mask is added by which an inhomogeneous field influences the vortex state of a nanodisk. Using numerical spin--lattice simulations we demonstrate that chirality can be controllably switched by a field pulse, whose intensity is above some critical value. A mathematical definition for the chirality of an arbitrary shaped particle is proposed.
REVTeX, 4 pages, 3 figures