ESR of Mn²⁺ in Pyrite Phase ZnS₂

Abstract

An ESR spectrum of Mn²⁺ with a strong axial crystal field was observed in powder sample of pyrite phase ZnS₂. The parameters obtained at 4.2 K are; g=2.009±0.004, D=(+)0.151±0.001 cm⁻¹, F=(−)0.003±0.001 cm⁻¹, |E|≤0.001 cm⁻¹ and A=(−)0.0071 cm⁻¹. D and F are uniaxial field parameters of the first and the second order, respectively. E is a rhombic field and A is a hyperfine constant, the sign of which was assumed as negative. D decreases slightly with increasing temperature (D=(+)0.142 cm⁻¹ at room temperature).