Proof-of-principle demonstration of 3D magnetic recording could lead to enhanced hard disk drives

https://techxplore.com/news/2024-04-proof-principle-3d-magnetic-hard.html

"FePt grains combined with heat-assisted laser writing high anisotropy magnetic recording medium, sustaining areal recording densities up to 10 Tbit/in2. (>10 Tbit/in2 possible using 3 or 4 recording levels HDD storage... lattice-matched, FePt/Ru/FePt multilayer films, with Ru spacer layer... FePt layers have different Curie temperatures, so recording becomes possible adjusting laser power when writing... future: processes reducing FePt grain size, improving orientation and magnetic anisotropy"