On the magnetic hyperfine interaction in Ga2Se3:EuSe defect crystals

Abstract The electron structure impurity nuclei 151Eu of Ga2Se3 defect compounds have been investigated by electron spin resonance and Mossbauer spectroscopy at temperatures between 77 and 300 K. Mossbauer spectra in samples were recorded at MS 700 M set up with Sm2O3 as the sources and isomer shift values were determined relative to EuF3. The microscopic properties of Ga2Se3:EuSe single crystals defect compounds have been studied by atomic absorption analysis and X-ray fluorescence analysis at room temperature. The temperature dependence of the magnetic hyperfine fields was also analyzed by using the spin-wave theory and the molecular-field model. We determined the Debye temperature ΘD and the charge states for 151Eu which turned out to be Eu2+(f7) ion with spin 7/2.