  Diluted magnetic semiconductors (DMS) are interesting because of the
interplay between the electronic and magnetic subsystems. We describe selected
magnetic properties of IV-VI diluted magnetic semiconductors, looking at the
similarities and differences between magnetic properties of II-VI, IV-VI, and
III-V DMS. We focus on the influence of the crystalline and electronic
structure of the material on its magnetic properties, especially on the
exchange interactions among magnetic ions. We describe methods of determination
of the exchange parameters by using different experimental techniques, such as
measurements of magnetic susceptibility, magnetization, and specific heat. We
follow the development in the material technology from bulk crystals to thin
films and nanostructures.
