New type of stable particle like states in chiral magnets (Chiral bobbers)

Abstract

We present a new type of a thermodynamically stable magnetic state at interfaces and surfaces of chiral magnets. The state is a soliton solution of micromagnetic equations localized in all three dimensions near a boundary and contains a singularity, but nevertheless has a finite energy. Both features combine to a quasi-particle state for which we expect unusual transport and dynamical properties. It exhibits high thermal stability and thereby can be considered as promising object for fundamental research and practical applications in spintronic devices. We provide arguments that such a state can be found in different B20-type alloys e.g. Mn${}_{1-x}$Fe${}_x$Ge, Mn${}_{1-x}$Fe${}_x$Si, Fe${}_{1-x}$Co${}_x$Si.

accepted in PRL

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