Abstract
Semimagnetic semiconductors, also called “diluted magnetic semiconductors”, are semiconductor compounds in which some cations are randomly substituted by magnetic ions. The most studied alloys are II–VI semiconductors containing manganese and particularly Cd 1− x Mn x Te. During the last 15 years, these compounds have received considerable attention, mainly because they present new and particularly interesting properties arising from the strong exchange interaction between the magnetic ions and the carriers of conduction and valence bands. This paper presents some of these magneto-optic and magnetic properties, such as the giant Faraday rotation and Zeeman effect and the magnetization steeps, which are now quite well explained. Recently, semimagnetic quantum wells and superlattices have been grown. They open new and very attractive fields of research. The last part of the paper will be devoted to these studies.
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