A5085443408- Solid-state spectroscopy and crystallography
- Inorganic Fluorides and Related Compounds
- Crystal Structures and Properties
- Ferroelectric and Piezoelectric Materials
- Magnetic and transport properties of perovskites and related materials
- Microwave Dielectric Ceramics Synthesis
- Multiferroics and related materials
- Advanced Condensed Matter Physics
- Acoustic Wave Resonator Technologies
- Thermal Expansion and Ionic Conductivity
- High-pressure geophysics and materials
- Glass properties and applications
- Crystallization and Solubility Studies
- Luminescence Properties of Advanced Materials
- Optical and Acousto-Optic Technologies
- X-ray Diffraction in Crystallography
- Material Science and Thermodynamics
- Inorganic Chemistry and Materials
- Chalcogenide Semiconductor Thin Films
- Rare-earth and actinide compounds
- Chemical Thermodynamics and Molecular Structure
- Shape Memory Alloy Transformations
- Organic and Molecular Conductors Research
- Elasticity and Wave Propagation
- Superconducting Materials and Applications
Institute of Physics
2015-2024
Siberian Federal University
2015-2024
Krasnoyarsk Scientific Center
2010-2023
Institute of Engineering Physics
2013-2023
Czech Academy of Sciences, Institute of Physics
1992-2023
Russian Academy of Sciences
2009-2019
Clausthal University of Technology
2017
Krasnoyarsk State Pedagogical University
2017
Institute of Chemistry and Chemical Technology
2015-2016
Siberian State Technological University
2016
We have investigated the spin and oxidation states of Co in ${\mathrm{Co}}_{3}{\mathrm{BO}}_{5}$ using x-ray magnetic circular dichroism (XMCD) dc susceptibility measurements. At low temperatures, XMCD experiments been performed at $K$-edge ${\mathrm{Co}}_{2}{\mathrm{FeBO}}_{5}$ single crystals fully ferrimagnetically ordered phase. The ($K$-edge) signal is found to be related ${\mathrm{Co}}^{2+}$ sublattices both compounds, providing strong experimental support for low-spin (LS)...
An analysis of the extensive and intensive barocaloric effect (BCE) at successive structural phase transitions in some complex fluorides oxyfluorides was performed. The high sensitivity these compounds to a change chemical pressure allows one vary succession parameters transformations (temperature, entropy, baric coefficient) over wide range obtain optimal values BCE. A comparison different types schematic T–p diagrams with complicated dependences observed experimentally shows that ranges...
Abstract Double fluoride salts (NH 4 ) 3 M 4+ F 7 (M : Sn, Ti, Ge, Si) demonstrate a high efficiency of using chemical pressure as tool for control and tuning structural ordering/disordering, sensitivity to hydrostatic pressure, successions the phase transitions, etc and, result, purposeful variation within wide range parameters barocaloric effect (BCE). The conventional inverse BCEs near triple points were found on T − p diagrams, combination which can be used construct original cooling...
Using the data about temperature–pressure phase diagram and transition entropy at ambient pressure, intensive ΔT AD extensive ΔS BCE barocaloric effects were estimated near structural order-disorder transitions in oxyfluorides Rb2KTiOF5 (NH4)2NbOF5. It was found that hydrostatic pressure is an effective tool to change of compounds with ordering ionic groups structure realize significant caloric comparable values electro- magnetocaloric effects, characteristic for a number materials,...
Magnetic and thermodynamic properties of perovskite Gd0.2Sr0.8CoO3−δ, with ordered disordered states Gd Sr in the A-sites crystal lattice have been studied revealing remarkable differences physical states. The samples larger oxygen nonstoichiometry, heat capacity, thermal expansion anomalies, abnormal temperature dependence magnetization around 350 K.
The thermal expansion along the a, b and c axes of a (NH(4))(2)NbOF(5) crystal was measured from 120 to 300 K. Anomalies α(T) associated with previously reported phase transitions Cmc2(1) --> C2 1a were observed all directions at T(1) = 259.3 K T(2) 220.5 analysis heat capacity in frame Pippard relations has permitted us determine uniaxial pressure derivatives transition temperatures dT/dσ(i). T-σ(i) diagrams have shown tendency for intermediate disappear high stress axes. Intensive...
Thermal properties and structure of initial distorted phases crystals K 2 KWO 3 F , (NH 4 ) WO Cs NH were studied to reveal the effect cationic substitution on disordering stability cubic Fm3m phase. It was found that nature phase transitions depends shape cation in 8c position.
Abstract The electrical resistivity of the Sm x Mn 1− S (0.15 ≤ 0.25) solid solutions in temperature range 80–300 K was measured. Minimum and maximum dependence were found, respectively, at T = 220 for 0.15 100 0.2 compounds. This behavior is explained from result mobility‐edge movement, disorder being due to elastic deformation spin density fluctuations with short‐range order. Metal–semiconductor phase transition versus concentration c 0.25 observed. Resistivity described by scattering...
The results of heat capacity, thermal dilatation and T-p phase diagram studies on the La0.7Pb0.3MnO3 single crystal are reported. Direct measurements intensive magnetocaloric effect performed by means adiabatic calorimeter. Barocaloric is determined using data capacity susceptibility to hydrostatic pressure. Caloric efficiency manganite in vicinity ferromagnetic transition discussed compared with that other magnetic materials.