Thermally induced cation ordering in $$\hbox {ZnAl}_{2}\hbox {O}_{4}{:}\hbox {Mg}^{2+}$$ ZnAl 2 O 4 : Mg 2 + , $$\hbox {Fe}^{3+}$$ Fe 3 + for sensing thermal history through photoluminescence

摘要: Applicability of spinel compounds is mainly governed by cation distribution in them. In the presented study, thermally induced ordering found to influence emission color $$\hbox {Mg}^{2+}$$ , {Fe}^{3+}$$ co-doped {ZnAl}_2\hbox {O}_4$$ spinel. Cation monitored through Mg K-edge, Fe $$L_{2,3}$$ -edge, O K-edge X-ray absorption near edge structure spectroscopy and diffraction analysis using synchrotron radiation. Thermal treatment provided sufficient energy {Zn}^{2+}$$ {Al}^{3+}$$ cations redistribute themselves on tetrahedral octahedral sites, reduce distortion, thereby gaining stability. Reduced inversion accompanied decrease oxygen vacancies, while increase site vacancies contributed toward more intense blue band quenched yellow band, changing from bluish-white blue. Correlation derived between luminescence upon thermal predict nanophosphors be useful sensing applications.