Size-dependent properties of Eu chalcogenide nanoparticles

Abstract The size effects on different properties, such as magnetization M , Curie temperature T C and band gap E g of ferromagnetic semiconducting EuS nanoparticles are studied based on the d–f model and using a Green's function technique. We have shown that M and T C are decreased compared with the bulk material, whereas E g is increased. The results are in qualitative agreement with the experimental data.