Magnetostatic Mechanism of Chiral Symmetry Breaking in Multilayer Magnetic Structures

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Abstract

It is shown that the energy of a ferromagnetic film deposited onto a paramagnetic or superconducting substrate acquires a contribution in the form of the Dzyaloshinskii–Moriya interaction. This contribution appears as a result of the magnetostatic interaction of the magnetization of the ferromagnetic film with the magnetization induced by it in a paramagnet or by the supercurrent in the superconductor and leads to the removal of the chiral degeneracy, nonreciprocity of spin waves, and the formation of chiral states such as magnetic skyrmions. Our estimates indicate the possibility of experimental observation of predicted effects.

About the authors

M. A Kuznetsov

Institute for Physics of Microstructures, Russian Academy of Sciences

Email: kuznetsovm@ipmras.ru
603950, Nizhny Novgorod, Russia

A. A Fraerman

Institute for Physics of Microstructures, Russian Academy of Sciences

Author for correspondence.
Email: andr@ipmras.ru
603950, Nizhny Novgorod, Russia

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