Publications by authors named "Selven Virasawmy"
Article Synopsis
- Magnetic skyrmions are two-dimensional magnetic structures characterized by continuous magnetization winding, while Hopfions are three-dimensional objects formed from twisted skyrmion strings.
- Theoretical models suggest that Hopfions can exist in certain magnetic systems and that skyrmions can be converted into Hopfions by modifying their magnetic properties, but experimental evidence has been rare.
- The study presents experimental evidence of magnetic Hopfions in nanoscale disk structures made from Ir/Co/Pt multilayers, using advanced imaging techniques to differentiate them from skyrmions, which could pave the way for their use in future spintronics applications.
The gold nanostructures fabricated on a substrate yield localized surface plasmon resonance. We describe the fabrication and characterization of nanocrescents on a silicon substrate, which are fabricated by depositing a gold film at an oblique angle through nanosphere lithography. Following the etching of the gold perpendicular to the substrate and the removal of the nanospheres by dissolution, nanocrescents with fine nanostructures are generated.
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