Updated: 7/13/2020
Since2002 asolid-state physics research laboratory has been established at the Department of Physics. The laboratory operates on a public basis. The Head of the Laboratory was appointed Head of the Department of Physics, Candidate of Physical and Mathematical Sciences, Associate Professor Yu.K. Ivashina. Since 2018, the laboratory is headed by Candidate of Physical and Mathematical Sciences, Associate Professor Ivashina YK.
The main areas of research conducted in the laboratory:
1. Investigation of the interaction of hydrogen atoms with defects in the crystalline structure of metals.
2. The influence of internal stresses and structural defects on the separation of the hydride phase in Me-H systems.
3. Investigation of the physical properties of higher rare earth borides.
The laboratory has developed research methods and made installations for the introduction of hydrogen into the metal, the study of the temperature dependences of the electro- and thermophysical properties of materials, coefficients of thermoEMF and linear expansion.
The laboratory has designed, manufactured and put into operation a unique installation for the study of the amplitude dependence of internal friction on plate-shaped samples. Installation allows, in a semi-automatic mode, to measure the logarithmic decrement of the oscillation damping of the test specimen at relative strain amplitudes from 10-6 to 10-3. To prevent acoustic costs, a vacuum of about 10-4 mmis created in the measuring cell. Hg Art.
Sample oscillations, using an inductive sensor, modulate the oscillation frequency of a high-frequency (about 3.8 MHz) oscillator. After the frequency detector, an electrical signal is generated proportional to the deviation of the sample from the zero level. The programmable amplifier with 24 fixed coefficients allows to output a signal amplitude to the standard level of a two-threshold amplitude discriminator. Internal friction is determined by calculating the number of oscillations between given amplitude levels. The ratio of the upper and lower thresholds of the amplitude discriminator is usually 1.2. Measurement results, in real time, are processed on a computer, graphically displayed on the screen, allowing you to quickly manage the experiment. At the end of the next series of measurements, the obtained data is stored in a file that can be imported into Excel spreadsheets for further analysis and publication.
With the help of this installation, the formation and characteristics of nanos segregation of hydrogen at dislocations in metals of groups IV and V are successfully conducted.
In recent years, the laboratory successfully implemented the state budget theme "Investigation of physical properties, the effect of deformation on the solubility of hydrogen, the bond of its atoms with dislocations in systems ME-H (D)".
On the basis of the laboratory, students in the field of Physics training * carry out coursework and final work, carry out scientific researches.