PAD-investigations on MnS cluster formation within the diluted magnetic semiconductor ZnMnS

Abstract Perturbed angular distribution (PAD) measurements were performed on Zn 1− x Mn x S ( x = 0.05, 0.06, 0.10, 0.18, 0.21 and 0.23). In our PAD experiments recoil-implanted 54 Fe ions were used as nuclear probes. By the local magnetic behaviour of the isolated 54 Fe nuclei we obtained information on the probe environment. The crystal having the lowest manganese concentration ( x =0.05) shows only one hyperfine component. The temperature dependence of this component is the same as in that case of pure ZnS. For samples with concentrations x ⪖0.06 two additional hyperfine components are observed. One of them is attributed to β- or γ-MnS clusters, respectively. The other additional component occurs for crystals having Mn-concentrations x ⪖0.10. The behaviour of this component is similar to the one observed with pure α-MnS. From our data we conclude that the additional components observed with Mn concentrations x ⪖0.06 are due to the formation of different types of MnS clusters. Our experimental findings are compared with the data of magnetic susceptibility, photoluminescence and EPR.