Magnetic properties of the semifluorinated and semihydrogenated 2D sheets of group-IV and III-V binary compounds

► H-ab (ab = SiC, GeC, SnC, BN, AlN, and GaN) and F-GaN sheets are ferromagnets. ► F-ab sheets (except for F-GaN sheet) are predicated to be antiferromagnets. ► Surface decoration can tune the magnetic properties of the 2D sheet. ► Magnetism arises from combined effects of through-bond and p-p direct interactions.