Accession Number : AD0713864

Title :   Spin-Relaxation Studies of Paramagnetic Defects in II-VI Crystals.

Descriptive Note : Final rept. 1 Feb 66-1 Feb 70,

Corporate Author : WESTINGHOUSE RESEARCH LABS PITTSBURGH PA

Personal Author(s) : Wagner,George R. ; Murphy,Joseph ; Castle,John G. , Jr

Report Date : JUN 1970

Pagination or Media Count : 157

Abstract : Spin-lattice relaxation studies were carried out on the substitutional impurities Cr(2+), Co(2+), and Mn(2+) in single crystals of wurtzite cadmium sulphide; on the substitutional impurity Mn(2+) in single crystals of cubic zinc sulphide; and on two paramagnetic centers in a single crystal of wurtzite cadmium sulphide which was enriched in 114Cd. All the crystals except the 114CdS were co-doped with lithium. The results have been interpreted for each case in terms of theoretical models for the defect centers and their interaction with their surroundings. The two centers in 114CdS have been tentatively identified. Calculations of the Jahn-Teller effect and the Ham effect for CdS:Cr(2+) have been performed and the results used to interpret the previously reported ESR properties and the results of the spin-lattice interaction studies reported here. Preliminary investigations of the effect of band-gap irradiation on the spin-relaxation of CdS:Mn(2+) are reported. (Author)

Descriptors :   (*ZINC SULFIDES, CRYSTAL DEFECTS), (*CADMIUM SULFIDES, CRYSTAL DEFECTS), (*CRYSTAL DEFECTS, *ELECTRON PARAMAGNETIC RESONANCE), IMPURITIES, CHROMIUM, COBALT, MANGANESE, PARAMAGNETIC MATERIALS, MICROWAVES, MOLECULAR ENERGY LEVELS, HYPERFINE STRUCTURE

Subject Categories : Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE