2024 – Magnetic flux microconcentrators based on magnetic metasurfaces

Relevant to TAČR/ CHIST-ERA project TH77010001 MetaMagIC: Magnetic Metasurfaces for sustainable Information and Communication technologies  
Output n° TH77010001-V01

Sample consist of NiFe magnetic metasurfaces formed by dense arrays of coupled magnetic NiFe disks (diameter 400 nm, thickness 60 nm) hosting magnetic vortices. Sample contains many magnetic flux concetrators created from such metasurfaces. Gaps (distances) among disks tune gain (magnetic field enhancement factor) and range of external fields with linear response. The smaller the gap, the higher gain and smaller field range. The gap is typically in tens of nm, ranging from nearly touching disks to 100 nm.