A5022866968- Physics of Superconductivity and Magnetism
- Astro and Planetary Science
- Planetary Science and Exploration
- Space Science and Extraterrestrial Life
- Geomagnetism and Paleomagnetism Studies
- Space Exploration and Technology
- Superconducting Materials and Applications
- Magnetic Bearings and Levitation Dynamics
- Superconductivity in MgB2 and Alloys
- Magnetic properties of thin films
- Magnetic and transport properties of perovskites and related materials
- Magnetic Properties and Applications
- Rare-earth and actinide compounds
- Advanced Condensed Matter Physics
- Methane Hydrates and Related Phenomena
- Characterization and Applications of Magnetic Nanoparticles
V.I. Vernadsky Institute of Geochemistry and Analytical Chemistry
2021-2024
Russian Academy of Sciences
2021-2024
Semenov Institute of Chemical Physics
1992-1996
Drastic changes in the experimental magnetization curve behaviour of fine-grained YBaCuO were observed when grain sizes D became commensurable with penetration depth lambda . In particular, magnetic field Hmax (when M(H) reached its maximum) increased significantly size decreased. A theoretical study initial flux line structure formation case approximately was carried out, drawing an analogy between HTSC samples at high temperatures and isotropic type II superconductor on basis a model...
Abstract Planetary geologic maps are crucial tools for understanding the geological features and processes of solid bodies in Solar System. Over past six decades, best practices planetary mapping have emphasized clear objective observation, interpretation, multi‐sensor fusion, iterative revision based on new data. We summarize here four ways which serve as indispensable instruments scientific investigation, from enhancing observations to interrogating surface processes. With respect space...
Magnetization curves M(H) were studied for a series of YBa2Cu3O7- delta polycrystalline samples with different microstructures (from fine-grained grain size R approximately 1 mu m to coarse-grained 50 m) synthesized from mechanically activated oxide mixture using both an original method and according well known methods (cryochemical traditional ceramic). For external magnetic fields, some lower than the critical field grains Hc1, quantitative estimation sizes shielded regions was carried...
Abstract The geomorphological and geological analysis of the surface three primary ten secondary landing ellipses (15 × 30 km) for Russian Luna-Glob automated scientific station ( Luna-25 ) is presented. earlier selected are found in sector 65°–85° S 0°–60° E lunar southern hemisphere. characteristics ellipse include age identification material sources. analyses water equivalent hydrogen concentration rock content on also carried out. constraints, such as inclination characteristic...
Changes in the behavior of magnetization curves M(H) fine-grained YBaCuO HTSC at temperatures near Tc are observed when grain size D becomes comparable with magnetic field penetration depth λ. The starting formation vortex structure samples typical ∼ λ is considered theoretically within a model that accounts for interaction vortices one another as well surface grains. creation fields seven initial calculated and theoretical obtained different D/λ ratios. We show substantial increase occurs...
Рассматриваются методы снижения рисков венчурного инвестирования, включающие снижение как на этапе отбора проектов, так и их финансирования. Особое внимание уделяется механизму инвестиций в скейлапы (scaleups) - быстрорастущие технологические компании, уже продемонстрировавшие возможности быстрого роста выручки. Предлагаемая методика позволяет оптимизировать количество учитываемых критериев проектов при одновременном снижении финансирования Methods of reducing venture funding risks both at...
It is shown that in the case when linear grain size commensurate with London penetration depth polycrystalline HTS materials, an addition source of irreversibility magnetization curves associated different positions pinned vortices relative to surface grains during field application and removal formed. The estimates based on a model taking into account interaction between as well their presence pinning forces revealed contribution M(H) at T⩾80 K can attain significant values, comparable...
Equilibrium magnetization M(H) as a function of magnetic field is calculated for type II superconductors (the Ginzburg–Landau parameter κ = 100) small size comparable with the London penetration depth. Calculations are made taking into account interaction Abrikosov vortices surface well grain distribution similar to that observed fine-grained polycrystalline HTS samples. A comparison theoretical curves experimental quasi-reversible at T 85 K YBaCuO reveals their good qualitative and...
Information about the magnitudes and field temperature dependences of transport critical currents in YBa2Cu3O7–δ ceramic high-Tc superconductors with various dispersities (the grain sizes are varied from ∼ 1 μm to 10 μm) is obtained an analysis magnetization curves. Measurements show that attainable fine-grained produced by preliminary mechanical activation order magnitude higher than samples prepared conventional technology.