English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Open

Presents the pdf analysis as premium feature

PDF Analysis

Insights

Presents the summarisation as premium feature

Summarisation

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

In this work we have used micromagnetic simulations to report four ways tobuild traps for magnetic skyrmions. Magnetic defects have been modeled as localvariations in the material parameters, such as the exchange stiffness,saturation magnetization, magnetocrystalline anisotropy andDzyaloshinskii-Moriya constant. We observe both pinning (potential well) andscattering (potential barrier) traps when tuning either a local increase or alocal reduction for each one of these magnetic properties. It is found that theskyrmion-defect aspect ratio is a crucial parameter to build traps forskyrmions. In particular, the efficiency of the trap is compromised if thedefect size is smaller than the skyrmion size, because they interact weakly. Onthe other hand, if the defect size is larger than the skyrmion diameter, theskyrmion-defect interaction becomes evident. Thus, the strength of theskyrmion-defect interaction can be tuned by the modification of the magneticproperties within a region with suitable size. Furthermore, the basic physicsbehind the mechanisms for pinning and for scattering is discussed. Inparticular, we discover that skyrmions move towards the magnetic region whichtends to maximize its diameter; it enables the magnetic system to minimize itsenergy. Thus, we are able to explain why skyrmions are either attracted orrepelled by a region with modified magnetic properties. Results here presentedare of utmost significance for the development and realization of futurespintronic devices, in which skyrmions will work as information carriers.

journal of magnetism and magnetic materials

Building traps for skyrmions by the incorporation of magnetic defects  into nanomagnets: pinning and scattering traps by magnetic properties  engineering