The Preparation and Properties of Cobalt-Doped II-VI Chalcogenides
Abstract
The II-VI compounds ZnS, ZnSe, CdS and CdSe have been studied extensively since they offer a variety of unique device applications. Compounds containing transition metal ions, e.g., Zn(1-x)Mn(x)Se, Zn(1-x)Co(x)Se and Cd(1- x)Fe(x)Se are known as dilute magnetic semiconductors. The presence of magnetic ions leads to a number of unusual electronic and optical properties which are due to the interaction of the magnetic ion with band electrons as well as to the exchange interaction between the magnetic ions themselves. Samples of cobalt- doped ZnS, ZnSe, CdS and CdSe were prepared by the direct combination of the elements. The limit of solubility of cobalt in these systems was established. Magnetic measurements indicate that the antiferromagnetic interactions of the cobalt in the zinc systems were greater than those observed in the cadmium chalcogenides. Single crystals of cobalt-doped zinc chalcogenides were grown by chemical vapor transport. Their IR transmission was measured and the cobalt concentration for maximum hardness was determined.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 26, 1989
- Accession Number
- ADA213409
Entities
People
- A. Wold
- C. M. Niu
- K. Dwight
- R. Kershaw