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Device geometry dependent deterministic skyrmion generation from a skyrmionium

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arxiv 2109.04973 v1 pith:5GLBSMPI submitted 2021-09-10 cond-mat.mtrl-sci

classification cond-mat.mtrl-sci
keywords deviceskyrmioniumskyrmionsdeterministicdevicesgenerationmagneticadjustable
verification ladder T0 review T1 audit T2 compute T3 formal
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A magnetic skyrmionium can be perceived as an association of two magnetic skyrmions with opposite topological charges. In this work, we have investigated the transformation of skyrmionium into multi-skyrmionic states via domain wall (DW) pairs in three different devices with variable geometric configurations. The same device geometries were considered for single ferromagnetic layer as well as synthetic antiferromagnetic (SAF) system. It is observed that by tuning the current density, deterministic generation of skyrmions is possible via the spin transfer torque (STT). The proposed device is efficiently adjustable to change the number of skyrmions . The results may lead to development of skyrmion-based devices for neuromorphic and unconventional computing.

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