SUPER-HIGH PRESSURE DEPARTMENT
The main task of the Department is the investigation of substance properties under pressures of the megabar range.
Principal lines of investigations
- Optic investigations of condensed matter, including the solid-state nanostructures;
- Quantum isotope effects under high pressure;
- Magnetic phenomena.
- A wide spectrum of high-pressure vessels with diamond and sapphire anvils and piston-cylinder hydrostatic pressure chambers.
- The combination scattering spectrometer equipped with the multichannel system for recording optic spectra.
- The Fourrier spectrometer.
- The Mö
ssbauer spectrometer with the resonance detector of g
- Instrumentation for investigation of the spectra of absorption, reflection, luminescence.
- Complex apparatus for the investigation of magnetic susceptibility.
- Apparatus for energy-dispersion analysis of roentgen radiation.
Most important results:
- A new technique for investigating supercon-ductivity of subminiature samples has been developed. Investigations of the induced super-conductivity in sulphur under pressures up to 1.6 Mbar have been carried out for the first time in the world practice (in cooperation with the Geophysical laboratory of the Carnegie Institute, USA).
- Investigations of dynamic properties of the germanium lattice with variable isotope compositions have been by combination scattering of light under high pressure.
- Investigations of dielectric-metal have been carried out and superconductivity has been detected in high-pressure metallic phases of a number of substances using a rounded cone-plane chamber.