Paramagnetic defects in ZnSe crystals doped with iron ions

Resumo

The electron paramagnetic resonance (EPR) spectra of iron-doped ZnSe single crystals were studied. In addition to cubic Fe³⁺ and Mn²⁺ centers and also Fe²⁺, and Cr²⁺ centers, monoclinic Fe³+ complexes locally compensated by Cu+ ions were revealed. Some trigonal centers with a spin of 3/2 were also found and studied. The zero-field splittings of monoclinic centers were measured, and the parameters of the monoclinic and trigonal spin Hamiltonians were determined. The nature of trigonal centers was discussed.