Magnetic semiconductors chalcogenides

Ternary compounds (not alloys) such as CdCr2Sc4 can be grown from a PbCl2-CdCl2 flux. These are magnetic semiconductors, but they have been eclipsed by the manganese- and iron-based alloys with zinc and cadmium chalcogenides, such as Cdi -,cMn,tTe. The pure compounds, usually made by direct reaction, are often used as... 

During the past 15 years the Eu chalcogenides have received tremendous interest by scientists all over the world. One obvious reason was the hope of using these magnetic semiconductors industrially, e.g. in the form of fast, light beam addressable memory systems in computers, as magneto-optical modulators or as magnetic field activated electronic switches. 

It is quite natural that not all authors and not all papers could be included in this review due to the limited amount of space and capability of the author. But since this article is not the only review and probably not the last one on this topic the problems and materials will always be illuminated from different points of view. With respect to magnetic semiconductors we want to recall that non-rare earth compounds like the Cr spinels (Haas, 1970) offer similar effects as the Eu chalcogenides. Also the group of the RE-pnictides may become ferromagnetic semiconductors with increasing purity and perfection of the samples, but at the moment their conduction mechanism is still in discussion (see also F. Hulliger, vol. 4, ch. 33 of this Handbook). 

G. Dresselhaus, Optical Properties of the Europium Chalcogenide Magnetic Semiconductors, NATO Advan. Study Inst. B 60 [1980] 315/35. 

In general, most of the magnetic semiconductors are to be found among the oxides and chalcogenides (sulfides, selenides, and tellurides) of transition elements and may exhibit one of the three possible types of magnetic order. For the insulating oxides the conduction electrons belong to bands formed primarily from the d orbitals of the cations. The d bands are narrow because the ions are relatively far apart. This... 

Mauger A, Godart C (1986) The magnetic, optical and transport properties of representatives of a class of magnetic semiconductors the europium chalcogenides. Phys Reports 141 51-176... 

Alloys Borates Solid-state Chemistry Carbides Transition Metal Solid-state Chemistry Chalcogenides Solid-state Chemistry Diffraction Methods in Inorganic Chemistry Electronic Structure of Solids Fluorides Solid-state Chemistry Halides Solid-state Chemistry Intercalation Chemistry Ionic Conductors Magnetic Oxides Magnetism of Extended Arrays in Inorganic Solids Nitrides Transition Metal Solid-state Chemistry Noncrystalline Solids Oxide Catalysts in Solid-state Chemistry Oxides Solid-state Chemistry Quasicrystals Semiconductor Interfaces Solids Characterization by Powder Diffraction Solids Computer Modeling Superconductivity Surfaces. 

Alloys Chalcogenides Solid-state Chemistry Hypervalent Compounds Magnetism of Extended Arrays in Inorganic Solids Magnetism of Transition Metal Ions Semiconductors. 

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