Content
Structure
Laboratory of "Radiation Physics of Magnetoelectrics"
Phone: (+994 12) 5383224
Fax: (+994 12) 5398318
Е-mail: sardarli@yahoo.com
Head of the Laboratory is: Doctor of Science in Physics and Mathematics, Sardarli Rauf Madat oglu
Total number of employees: 9
The main activities of the laboratory are:
Studying the dielectric, optical, and impedance spectra of monocrystals with layered and chain structures based on compounds of the TlBX2 (B = In, Ga; X = S, Se, Te) type and solid solutions based on them; and studying the effects of gamma rays on them.
The main scientific results of the Laboratory are:
1. It has been established that the features observed in the temperature dependence of the electrical conductivity (σ(T)) of samples of solid solutions of the TlSe1-xS2x system irradiated with γ-quanta at temperatures above room temperature are associated with the transition of the crystal to the superionic state. A mechanism was proposed to explain the observed nature of the conductivity, and it was shown that the observed ionic conductivity is related to the diffusion of Tl+ ions through vacancies in the thallium sublattice.
2. The spectra of the complex impedance of solid solutions of the TlSe1-xS2x system irradiated with primary and γ-quanta have been studied. Warburg diffusion impedance was determined from the curves of the impedance hodograph obtained after γ-irradiation. The rays in the impedance diagram are associated with the Warburg diffuse impedance, on the basis of which the sinusoidal signal of these ions cannot reach the boundary of the diffusion layer in the frequency range.
3. The electrical conductivity of TlBX2 (B = In, Ga; X = S, Se, Te) crystals with layered and chain structures irradiated in different doses and the solid solutions formed on their basis were studied in the temperature range of 100-300 K, and the temperature ranges of the hopping conductivity were determined. According to the Mott approximation, it was found that the values of the parameters of the hopping conductivity vary significantly depending on the composition and the dose of γ-irradiation.