A5102801561- Physics of Superconductivity and Magnetism
- Quantum, superfluid, helium dynamics
- Crystallization and Solubility Studies
- Atomic and Subatomic Physics Research
- Superconducting Materials and Applications
- X-ray Diffraction in Crystallography
- Cold Atom Physics and Bose-Einstein Condensates
- HVDC Systems and Fault Protection
- High-pressure geophysics and materials
- Magnetic properties of thin films
- Quantum Chromodynamics and Particle Interactions
- 2D Materials and Applications
- Theoretical and Computational Physics
- Quantum many-body systems
- Topological Materials and Phenomena
- Quantum and electron transport phenomena
- Superconductivity in MgB2 and Alloys
- Complex Systems and Time Series Analysis
- Magnetic Properties and Applications
- Astro and Planetary Science
- Algebraic structures and combinatorial models
- Advanced Thermodynamics and Statistical Mechanics
- Fluid Dynamics and Thin Films
- Particle accelerators and beam dynamics
- Black Holes and Theoretical Physics
Lomonosov Moscow State University
2011
P.L. Kapitza Institute for Physical Problems
1990-1992
Abstract The fusion power density produced in a tokamak is proportional to its magnetic field strength the fourth power. Second-generation high temperature superconductor (2G HTS) wires demonstrate remarkable engineering current (averaged over full wire), J E , at very fields, driving progress and other applications. key challenge for HTS has been offer an acceptable combination of consistent superconducting performance volume supply, low price. Here we report reproducible practical based on...
Reproducibility of superconducting properties and suitability for specific applications by means customised finish are two important attributes required from commercial 2G HTS wire. This paper reviews the consistent performance SuperOx production wire describes novel customisation options: surround polyimide varnish insulation composite bulk materials assembled with wires soldered together.
We report the observation of two kinds novel nonhydrodynamic spin-transport phenomena quasiparticles in superfluid $^{3}\mathit{B}$. find a drastic low-temperature depression transverse quasiparticle spin-diffusion coefficient. In addition, we have done first measurements Leggett-Takagi spin-relaxation time far outside hydrodynamic regime. The observations spin diffusion are shown to be quantitative agreement with kinetic-equation approach dynamics.
Structural engineering of topological bulk materials is systematically explored with regard to the incorporation buckled bismuth layer [Bi2], which a 2D insulator per se, into layered BiTeI host structure. The previously known telluride iodides, and Bi2TeI, offer physical properties relevant for spintronics. Herewith new cousin, Bi3TeI (sp.gr. R3m, = 440.12(2) pm, c 3223.1(2) pm), joins ranks expands this structural family. [Bi2][BiTeI] represents stack strictly alternating building blocks....
Halogen substitution, that is, bromine for iodine, in the series of topological BinTeI (n = 1, 2, 3) materials was conducted order to explore impact anion exchange on electronic structure. In this proof-of-concept study, we demonstrate applicability modular view crystal and structures new Bi2TeBr Bi3TeBr compounds. Along with isostructural telluroiodides, they constitute a family layered are stacked from two basic building modules, ∞2[Bi2] ∞2[BiTeX] (X I, Br). We present solid-state...
Two major in-line quality control tools implemented at SuperOx in the production of textured templates for 2G HTS wire are digital processing optical images electropolished substrate surface and reflected high energy electron diffraction (RHEED) analysis texture IBAD-MgO layer. In routine production, we use these continuous screening early rejection defective material thus reduce cost finished wire. Overlapping moving tape exiting electropolishing system taken processed, to yield three...
The orientation of high T <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">c</sub> superconducting RBa xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> Cu xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> O xmlns:xlink="http://www.w3.org/1999/xlink">7</sub> (RBCO) films is crucial for achievement properties. However, it known that good lattice match between film and substrate provides favorable conditions the growth undesirable (100)-oriented...
In this article we summarize our results on the fabrication process of Ni-Cr-W biaxially textured tape, which is non-magnetic at 77 K. The deposition processes buffer and HTS layers by reel-to-reel MOCVD technology are described as well. wire finished with depositions silver protective layer magnetron sputtering copper stabilizing electroplating. Sharp cubic texture in-plane out-of-plane misorientation below 7 degrees low surface roughness (Ra < 5 nm 5*5 μm2 area) have been achieved...
Industrial 2G HTS wires optimized for low-temperature application are studied using XRD. We aim at understanding the origin of noticeable variation lift factor <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">LF</i> = xmlns:xlink="http://www.w3.org/1999/xlink">J<sub>c</sub></i> (20K, 8T)/ (77 K, sf) with final goal narrowing down statistical scatter performance in production wires. Two approaches used - (1) direct characterization Y123 defect...
We explain the experimental dramatic increase of relaxation uniform spin precession at T = 0.45Tc. At < 0.45Tc amplitude Fermi-liquid dissipative mode is shown to be nonzero because nonlinear coupling oscillation Larmor precession.
2G HTS wire with high engineering current density is desired for applications where compact, power superconducting equipment important. We have succeeded in enhancing of commercial SuperOx based on GdBCO by increasing the layer thickness without fast degradation film microstructure. This was possible after improving temperature uniformity along deposition zone. In particular, increased from 700-770 A/mm2 (for a 65 μm-thick stabilisation) or 430-480 105 stabilised wire) at beginning this...