A5051652293- Magnetic and transport properties of perovskites and related materials
- Shape Memory Alloy Transformations
- Advanced Condensed Matter Physics
- Rare-earth and actinide compounds
- Heusler alloys: electronic and magnetic properties
- Multiferroics and related materials
- Material Science and Thermodynamics
- Magnetic Properties of Alloys
- Solidification and crystal growth phenomena
- Ferroelectric and Piezoelectric Materials
- Thermal Expansion and Ionic Conductivity
- Optical properties and cooling technologies in crystalline materials
- Intermetallics and Advanced Alloy Properties
- Theoretical and Computational Physics
- Phase-change materials and chalcogenides
- Magnetic Properties and Applications
- High-pressure geophysics and materials
- Metallic Glasses and Amorphous Alloys
- Magnetic properties of thin films
- High Entropy Alloys Studies
- Advanced Thermoelectric Materials and Devices
- Physics of Superconductivity and Magnetism
- Thermodynamic and Structural Properties of Metals and Alloys
- Creativity in Education and Neuroscience
Institute of Physics. HI Amirkhanova
2010-2023
Immanuel Kant Baltic Federal University
2021
National University of Science and Technology
2021
National Academy of Sciences of Belarus
2021
Dagestan Scientific Center of the Russian Academy of Sciences
2020
South Ural State University
2018
Russian Academy of Sciences
2011-2012
The magnetocaloric effect (MCE) in an Fe48Rh52 alloy and Sm0.6Sr0.4MnO3 manganite was studied cyclic magnetic fields. adiabatic temperature change the for a field (ΔB) of 8 T frequency (f) 0.13 Hz reaches highest value (ΔTad) −20.2 K at 298 K. magnitude MCE ΔTad = 6.1 same 143 regions, where strong is exhibited alternating field, are bounded both compounds. In case alloy, range this phenomenon above by ferromagnetic to antiferromagnetic transition zero condition during cooling. manganite,...
Monte Carlo simulations were used for a detailed description of magnetic, martensitic and magnetocaloric properties Ni 2+ x Mn 1− Ga (0.18 ⩽ 0.24) 50 34 In 16 Heusler alloys, which undergo first-order magnetostructural phase transition. the we made use magnetic exchange parameters obtained by ab initio calculations. Results lattice contributions to total specific heat as well change in isothermal entropy Δ S mag adiabatic temperature T ad changes around transitions an external field agree...
In this report, we present results of the direct measurements adiabatic temperature change in MnAs1−xPx compounds (x = 0, 0.02, 0.025, and 0.03) cyclic magnetic fields up to 8 T. The substitution As by P a slight shift Curie more notable magnetocaloric effect (MCE) value. Estimations lattice contributions show that MnAs compound, contribution dominates (about 70% total MCE). Substitution with phosphorus leads decrease value MCE, which is caused contribution, almost does not absolute A...
Results of the experimental investigations magnetocaloric effect (MCE) and magnetostriction in Pr0.7Sr0.2Ca0.1MnO3 manganite temperature range 80–310 K magnetic fields up to 80 kOe are presented. The behavior MCE is characteristic materials with magnetostructural phase transitions first order. Frequency (1–14 Hz) dependences a field 6.2 investigated. It shown that near TC, ΔT dependence frequency f well described by expression: ΔT(f)=ΔTf=0−Bfn (n = 1.53, B 0.01185 K/Hzn). results...
A method is proposed to estimate the lattice and magnetic contributions total magnetocaloric effect (MCE) in materials with magnetostructural phase transitions. The based on two assumptions: (a) contribution proportional magnetostriction (b) obeys a field dependence ΔTm ∼ Hn. Temperature dependences of MCE are used contributions. Estimations Sm0.6Sr0.4MnO3 manganite made for cases when n = 0.66 0.75. Analysis shows that area maximum 0.66, subsystem contributes about 58% MCE, remaining 42%...
In this paper, we focus on understanding the magnetic field and temperature dependences of heat capacity CP, electrical resistivity ρ, magnetocaloric effect ΔTad in Fe48Rh52 alloy near room temperatures. The phase diagram is constructed according to CP(H, T) ρ(H, data, shift critical found be 9.6 K/T. experimental results do not confirm existing assumption about electronic nature antiferromagnet–ferromagnet transition FeRh alloy. An increase resistance through ferromagnetic–antiferromagnetic...
In cyclic magnetic fields with an amplitude of up to 8 T, the magnetocaloric effect (MCE) and thermal expansion in Ni46Mn41In13 Heusler alloy are investigated. The structural contributions total entropy change estimated, it was found that contribution is dominant have different signs (ΔSm = 12.19 J/kg K, ΔSstr −1.05 K). weak fields, values MCE heating cooling runs differ greatly, which associated unequal response structurally magnetically inhomogeneous system influence a field.
The paper investigates the magnetobarocaloric effect in a multiferroic composite made of ferroelectric and manganite components. Such phenomenon can be classified as secondary multicaloric effect. Its theoretical description is provided. In presence magnetic field temperature-dependent elastic arises magnetostrictive material that results reaches its maximum entropy change 0.044 J kg−1K–1 at 312.5 K for under study.
The thermal expansion (Delta l/l0), magnetocaloric effect Tad) and the magnetostriction (λ) of a polycrystalline sample Ni43.18Mn45.15In11.67 Heusler alloy were studied. A correlation has been established between magnetostriction. smaller value MCE in cooling run can be explained by contribution lattice subsystem to total measured MCE. It is found that long-term action cyclic magnetic field results decrease Delta Tad region first-order magnetostructural phase transition. virgin properties...
AbstractThe magnetocaloric effect (MCE) and the magnetostriction in Ni_49.3Mn_40.4In_10.3 Heusler alloy have been measured ac magnetic fields to 8 T. It is shown that contributions of structural subsystems MCE opposite signs; this case, contribution subsystem dominant. The anomalous temperature dependence during magnetostructural phase transition (PT) explained by competition processes growing austenite nuclei striction them.