Some useful links

Crystallographic open database (COD)   http://www.crystallography.net/

European Magnetism Association     https://magnetism.eu/

The materials project   https://next-gen.materialsproject.org/

NanoHUB    https://nanohub.org/

JREC-IN Portal   https://jrecin.jst.go.jp/seek/SeekTop?ln=0