Raman and EPR Characterization of Diluted Magnetic Semiconductor Sb2–xMnxS3 Nanocrystals Grown in a Glass Matrix

Structural and magnetic property change for different Mn concentrations in diluted magnetic semiconductor Sb2–xMnxS3 nanocrystals grown in a glass host matrix were investigated. Transmission electron microscopy images and energy dispersive X-ray analyses and Raman spectra with the modified model confirm the size and composition of nanocrystals. Electron paramagnetic resonance shows six hyperfine lines of the electron states, which are attributed to the interaction between the electron spin (S = 5/2) and the nuclear spin (I = 5/2) of Mn2+ ions (3d5) located in the crystal field of Sb2S3 semiconductor. Also, a change in Mn–Mn interactions is observed as Mn concentration increases. The blueshift of the Raman band around 188 cm–1 with increasing Mn concentration gives strong indications of the substitution of Mn2+ ions for Sb3+ ions in the crystalline structure of Sb2S3. In addition, the band around 217 cm–1 remains constant for Mn concentrations of 0.00–0.10. However, for x = 0.20, a displacement of 210 cm–1...