Carrier-mediated ferromagnetism vs antiferromagnetic compensation in co-doped ZnS nanoparticles
ZnS nanoparticles co-doped with Ni–Cr and Ni–Cu were synthesized by chemical precipitation and systematically examined for structural, optical, magnetic, and magneto-transport properties. All samples retained the cubic zinc blende phase with nanoscale crystallinity. Optical studies showed that Ni doping induced bandgap narrowing through sp-d exchange, while Cu and Cr introduced Burstein-Moss-type
