Controlling domain wall chirality by combining hard and soft magnetic materials in planar nanostructures with wire-ring morphology.

Vortex domain walls (DWs) are characterized by their chirality, an important property that needs to be controlled for the use of such walls in potential technological applications. In this work we explore a wire-ring structure in which we have alternate hard and soft magnetic materials. Our results evidence that, depending on the materials, it is possible to control the DW chirality when it goes through the ring section. Therefore, this system can be used as a device that controls domain wall chirality. • We propose a way to control the domain wall chirality using materials with different coercivity. • We investigate a planar nanowire with a triangular tip at one end and a ring at its center using OOMMF simulations. • Our results showing that the coercivity of the structure is completely determined by the material of the nanowire. • Our results evidence that, depending on the materials and geometry it is possible to control de DW chirality. [ABSTRACT FROM AUTHOR]