| Autor: |
Brezvin, R. S., Shchepanskyi, P. A., Shapravskyi, A. O., Stadnyk, V. Yo., Rudysh, M. Ya., Ftomyn, N. Y. |
| Předmět: |
|
| Zdroj: |
Low Temperature Physics; Oct2024, Vol. 50 Issue 10, p911-916, 6p |
| Abstrakt: |
Crystals of β-LiNH4SO4 doped with 2 and 5 wt% of Cu2+ and Mn2+ were synthesized. The crystal structure was determined using X-ray diffraction, and the dispersion of refractive indices and birefringence was investigated. The study revealed that adding impurities increased the absolute values of the refractive indices for all crystal physical directions. As the concentration of Mn2+ and Cu2+ impurities increased to 5%, the average refractive index showed an almost linear increase, attributed to the increase in crystal density due to a decrease in the volume of the unit cell. Furthermore, the impurities of Mn2+ and Cu2+ ions significantly altered the absolute values of birefringence. The refractions, electronic polarizabilities, and dispersion parameters were calculated using the Sellmeier formula, showing that adding impurities increased the values of molar refractions and electronic polarizabilities. The study also found that introducing Mn2+ and Cu2+ impurities shifted the optical isotropic point to the long-wavelength part of the spectrum by approximately 26 and 31 nm, respectively. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
