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| Description
| - The main objective of the project is study of the conditions for optimisation and stabilisation of critical currents in high-Tc superconductors with the aim to find such conditions that would favorite use of these materials in technical applications.We will study the magnetic moment induced by a change of the external magn.field,its relaxation rate,effectivity of different types of impurities and pinning centres produced artificially e.g.by the heavy ion irradiation,current transport in BiSrCaCuO tapesand the effects facilitating holding of these current at a possibly highest level.Magnetic measurements will be combined with a detailed chemical and crystallographic analyses and microscopic study of the sample morphology.Analyses of the relaxation and transport measurements will results in maps of critical currents dependencies on field,temperature and relaxation rate,so called (J-B-T-E)planes that fully characterise properties of the superconducting currents in the samples. (en)
- Základním záměrem navrhovaného projektu je studium podmínek pro optimalizaci a stabilizaci proudů ve vysokoteplotních supravodičích s cílem najít takové podmínky, za nichž budou tyto materiály přijatelné a výhodné pro technické aplikace. Především bychom chtěli studovat magnetický moment indukovaný změnou magnetického pole a rychlost jeho relaxace, efektivitu různých druhů příměsí a upínacích center, vytvořených např. ozařováním těžkými ionty, dále transport proudu v páskách BiSeCaCuO a efekty napomáhající udržení tohoto proudu na co nejvyšší úrovni. Magnetické a elektrické testy budou doplněny podrobnými chemickými a krystalografickými rozbory a mikroskopickým studiem morfologie vzorků. Výsledkem analýz relaxačních a transportních jevů budou mapy závislostí kritického proudu na poli, teplotě a relaxační rychlosti, tzv. (J-B-T-E) plochy, plně charakterizující vlastnosti supravodivých proudů na vzorcích.
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| Title
| - Critical currents in high-Tc superconductors and the ways to their enhancement (en)
- Kritické proudy ve vysokoteplotních supravodičích a způsoby jejich zvyšování a stabilizace
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| skos:notation
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| http://linked.open...avai/cep/aktivita
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| http://linked.open...kovaStatniPodpora
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| http://linked.open...ep/celkoveNaklady
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| http://linked.open...datumDodatniDoRIV
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| http://linked.open...i/cep/druhSouteze
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| http://linked.open...ep/duvernostUdaju
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| http://linked.open.../cep/fazeProjektu
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| http://linked.open...ai/cep/hlavniObor
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| http://linked.open...hodnoceniProjektu
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| http://linked.open.../cep/klicovaSlova
| - critical currents; high-Tc superconductors; point-like disorder; melt- textured superconductors; magnetic properties; RE-123; Bi-Sr-Ca-Cu-O; transportcurrents; vortex pinning (en)
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| http://linked.open...ep/partnetrHlavni
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| http://linked.open...inujicichPrijemcu
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| http://linked.open...cep/pocetPrijemcu
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| http://linked.open...ocetSpoluPrijemcu
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| http://linked.open.../pocetVysledkuRIV
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| http://linked.open...enychVysledkuVRIV
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| http://linked.open...iciPoslednihoRoku
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| http://linked.open...atUdajeProjZameru
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| http://linked.open...usZobrazovaneFaze
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| http://linked.open...ai/cep/typPojektu
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| http://linked.open...jektu+dodavatelem
| - Vývoj špičkových materiálů typu RE1,RE2,RE3)Ba2Cu3O7(RE=vzácná zemina) pro permanentní supravodivé magnety, objeven nový typ upínací struktury. Teorie elektrického pole v supravodiči. Teorie upnutí tokočar na velkých normálních částicích. (cs)
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| http://linked.open...tniCyklusProjektu
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| http://linked.open.../cep/klicoveSlovo
| - critical currents
- magnetic properties
- Bi-Sr-Ca-Cu-O
- RE-123
- high-Tc superconductors
- melt- textured superconductors
- point-like disorder
- transportcurrents
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| is http://linked.open...vavai/riv/projekt
of | - Electric field in stationary superconductors.
- Electric field in stationary superconductor.
- Vortex pinning by large normal particles in high-T c superconductors.
- Flux pinning model and pinning pressure in superconductors with randomly distributed columnar defects.
- Far-infrared thermal spectroscopy of low-T c and high-T c superconductor films.
- Observation of sequence of transitions from 2D to 3D superconducting state in YBa 2Cu3O 6+x single crystal
- Magnetic properties of (Nd 0.33Eu 0.33Gd 0.33)Ba 2Cu 3O y doped by additional Gd-211 particles.
- Comparison of different approaches to modelling the fishtail shape in RE-123 bulk superconductors.
- Perfect fits of J c -B dependencies in NEG-123 bulk samples with 30 Gd-211 fine particles.
- Optimalization of matrix chemical ratio for high flux pinning in ternary (Nd-Eu-Gd)Ba 2 Cu 3 O y .
- Single-domain NEG bulk superconductors for high magnetic field applications.
- Thermal partial vortex depinning and channel formation in type-II superconductors.
- Flux pinning by Gd-211 particles in ternary (Nd 0.33 Sm 0.33 Gd 0.33 )Ba 2 Cu 3 O y melt processed superconductors.
- High flux pinning in ternary (Nd-Eu-Gd)Ba 2 Cu 3 O y superconductors at 77K.
- Matrix chemical ratio and its optimization for highest flux pinning in ternary (Nd-Eu-Gd)Ba 2 Cu 3 O y .
- Magnetic phase transitions in U 3 Al 2 Si 3 .
- New type of vortex pinning structure effective at very high magnetic fields.
- Nuclear resonance shift in the vortex lattice in YBa 2 Cu 3 O 7 .
- Anylysis of magnetic hysteresis in melt-textured (Nd, Eu, GD)-Ba 2 Cu 3 O 7-.delta. .
- Anomalies associated with intergranular currents in a Bi-2223 monocore tape.
- Electrostatic potential in superconductor.
- Engineering of J c -B characteristics of RE-Ba-Cu-O melt-textured superconductors.
- Fabrication and characterization of LRE 1+x Ba 2-x Cu 3 O y (LRE:Nd, Eu, Gd,NEG) superconductors:a low oxygen partial pressure.
- Excess of Eu in the(Nd 0.33 Eu 0.33+x Gd 0.33-x )Ba 2 Cu 3 O y system: the way to a high irreversibility field at 77 K.
- J c -B performance of na OCMG processed (Sm 0.33 Eu 0.33 Gd 0.33 )Ba 2 Cu 3 O y with sub-micron Gd 2 BaCuO 5 second phase.
- Peculiarities of induced inter-granular currents in Bi-2223/Ag tapes.
- J c -B characteristics of (Nd-Eu-Gd)-123 materials doped by small Gd-211 particles.
- Pinning and scaling behavior in RE-123 materials.
- Charge profile in vortices.
- Comment on 'Temperature dependence of the second magnetization peak in a deoxygenated YBa 2 Cu 3 O 6.65 single crystal'.
- Bernoulli potential at a superconductor surface.
- Correlation of anomalous magnetic properties and mechanical treatment of Bi 2 Sr 2 Ca 2 Cu 3 O 10 silver-sheathed tapes.
- Magnetic and microstructure study of bulk (Sm 0.33 Eu 0.33 Gd 0.33 )Ba 2 Cu 3 O y with submicron Gd 2 BaCuO 5 second-phase particles.
- Pinning characteristics in chemically modified (Nd, Eu, Gd)-Ba-Cu-O superconductors.
- Effect of CeO 2 addition on microstructure and magnetic properties in (Nd,Eu,Gd) -Ba-Cu-O.
- J c -B performance study of an OCMG (Nd-EU-GD)-123 material doped by sub-micrometre Gd-211 particles.
- Improvement in field trapping capability of (Nd, Eu, Gd) Ba 2 Cu 3 O y and Ag 2 O addition.
- Influence of combined Pt and CeO 2 additions on microstructure and magnetic properties in (Nd, Eu, Gd)-Ba-Cu-O.
- Microstructure of (Nd, Eu, Gd)-123 matrix with (Nd, Eu, Gd)-121 inclusion.
- Single-domain NEG-123 bulk superconductors for high magnetic applications.
- Microstructure and flux pinning of OCMG processed (Sm 0.33 Eu 0.33 Gd 0.33 )Ba 2 Cu 3 O y with sub-micron Gd 2 BaCuO 5 second phase particles.
- Mixed state Hall effect in the multiphase superconductors.
- Scattering approach to the magnetic susceptibility of high-temperature superconductors
- Relaxation study of RE-123 materials with different types of pinning defects.
- Recent progress in melt-processed (Nd-Sm-Gd)B 2 Cu 3 O y superconductors.
- Reciprocity theorem in high-temperature superconductors.
- Strong pinning in ternary (Nd-Sm-Gd)Ba 2 Cu 2 O y superconductors.
- Surface charge of a flat superconducting slab in the Meissner state.
- Superconductors for high-field use at 77 K.
- Transverse voltage and reciprocity theorem in magnetic fields for high Tc superconductors
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| is http://linked.open...vavai/cep/projekt
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