A. Yu. Tsvetkov
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View article: Vortex matter and strong pinning in underdoped PrFeAs(O,F) with atomic-sized defects
Vortex matter and strong pinning in underdoped PrFeAs(O,F) with atomic-sized defects Open
We present a comprehensive investigation of the field-dependent critical current density and pinning force, combined with a detailed analysis of the nanostructural defect landscape in single crystal of underdoped PrFeAs(O,F) superconductor…
View article: Two-gap superconductor ZrB$_{12}$ with dynamic stripes and charge density waves: Crystal structure, physical properties and pairing mechanism
Two-gap superconductor ZrB$_{12}$ with dynamic stripes and charge density waves: Crystal structure, physical properties and pairing mechanism Open
A review of long-term studies of ZrB$_{12}$ and LuB$_{12}$ superconductors with very similar conduction bands and phonon spectra, but with radically different (by a factor of 15-20) critical temperatures and magnetic fields is presented. A…
View article: Evidence for spin droplets (ferrons) formation in the heavy fermion metal CeB$_6$ with dynamic charge stripes
Evidence for spin droplets (ferrons) formation in the heavy fermion metal CeB$_6$ with dynamic charge stripes Open
The presented studies of resistivity (R), thermal conductivity (k) and specific heat (C) at low temperature 1.8-7 K in magnetic field up to 90 kOe made it possible to detect for the first time the exponential field dependences R(H), 1/k(H)…
View article: Localized Superconductivity in LaB6 Hexaboride with Dynamic Charge Stripes
Localized Superconductivity in LaB6 Hexaboride with Dynamic Charge Stripes Open
Type II superconductivity with T c ∼ 6 K is discovered in LaB 6 . The critical fields are determined and the estimates for the coherence length ξ(0) ∼ 240 Å, the Ginzburg−Landau parameter κ GL ∼ 2, and the electron–phonon coupling constant…
View article: Phase Formation of Iron-Based Superconductors during Mechanical Alloying
Phase Formation of Iron-Based Superconductors during Mechanical Alloying Open
We successfully synthesized bulk Ba0.6Na0.4Fe2As2 and Sr0.5Na0.5Fe2As2 compounds by high-energy mechanical alloying (MA) technique. The MA process results in homogeneous amorphous phases of BaFe2As2 and SrFe2As2. It was found that the opti…
View article: Magnetic resonances in EuSn<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si32.svg" display="inline" id="d1e429"><mml:msub><mml:mrow/><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:math>As<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si32.svg" display="inline" id="d1e437"><mml:msub><mml:mrow/><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:math> single crystal
Magnetic resonances in EuSnAs single crystal Open
View article: Physical properties of MnSi at extreme doping with Co: Quantum criticality
Physical properties of MnSi at extreme doping with Co: Quantum criticality Open
The samples of (Mn$_{1-x}$Co$_x$)Si with $x=0.15$ and $x=0.17$ were grown and\ntheir physical properties: magnetization and magnetic susceptibility,\nresistivity and heat capacity were studied. The data analysis included also the\nprevious…
View article: Development and large volume production of extremely high current density YBa2Cu3O7 superconducting wires for fusion
Development and large volume production of extremely high current density YBa2Cu3O7 superconducting wires for fusion Open
View article: Effect of Multiplicity Fluctuation in Cobalt Ions on Crystal Structure, Magnetic and Electrical Properties of NdCoO3 and SmCoO3
Effect of Multiplicity Fluctuation in Cobalt Ions on Crystal Structure, Magnetic and Electrical Properties of NdCoO3 and SmCoO3 Open
The structural, magnetic, electrical, and dilatation properties of the rare-earth NdCoO3 and SmCoO3 cobaltites were investigated. Their comparative analysis was carried out and the effect of multiplicity fluctuations on physical properties…
View article: Structural, magnetic, electronic, and dilatation properties of the ordered solid solutions Ln0.2Sr0.8CoO3-δ (Ln = Sm, Gd, Dy) with the same oxygen nonstoichiometry index δ
Structural, magnetic, electronic, and dilatation properties of the ordered solid solutions Ln0.2Sr0.8CoO3-δ (Ln = Sm, Gd, Dy) with the same oxygen nonstoichiometry index δ Open
View article: Development of an automated system for deploying software for automated workstations of the spacecraft flight control center
Development of an automated system for deploying software for automated workstations of the spacecraft flight control center Open
At present, the daily and combat activities of almost any army in the world are largely determined by the quality of information and space support. At the same time, the quality of support depends largely on the stability of the functionin…
View article: Electronic band structure and superconducting properties of SnAs
Electronic band structure and superconducting properties of SnAs Open
We report comprehensive study of physical properties of the binary superconductor compound SnAs. The electronic band structure of SnAs was investigated using both angle-resolved photoemission spectroscopy (ARPES) in a wide binding energy r…
View article: Microstructure and superconducting properties of high-rate PLD-derived GdBa2Cu3O7−δ coated conductors with BaSnO3 and BaZrO3 pinning centers
Microstructure and superconducting properties of high-rate PLD-derived GdBa2Cu3O7−δ coated conductors with BaSnO3 and BaZrO3 pinning centers Open
The microstructure of GdBa 2 Cu 3 O 7− δ based on superconducting tapes with BaSnO 3 and BaZrO 3 artificial pinning centers formed by high-rate pulse laser deposition in SuperOx Japan was studied by scanning/transmission electron microscop…
View article: Superconducting gap symmetry in the superconductor <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>BaFe</mml:mi><mml:mrow><mml:mn>1.9</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mi>Ni</mml:mi><mml:mrow><mml:mn>0.1</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mi>As</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>
Superconducting gap symmetry in the superconductor Open
We report on the Andreev spectroscopy and specific heat of high-quality\nsingle crystals BaFe$_{1.9}$Ni$_{0.1}$As$_{2}$. The intrinsic multiple Andreev\nreflection spectroscopy reveals two anisotropic superconducting gaps $\\Delta_L\n\\app…
View article: A theoretical basis of the approach for the magnetic field penetration measurement
A theoretical basis of the approach for the magnetic field penetration measurement Open
An approach for the assessment of London penetration depth of superconducting films is proposed. This approach is based on the analysis of linear response of the sample to a local low-frequency alternating magnetic field generated by the m…
View article: Analog-to-digital conversion of signals with angular manipulation for software defined radio systems
Analog-to-digital conversion of signals with angular manipulation for software defined radio systems Open
The paper deals with the search of ways for speeding up and accuracy increase of conversion of modern analog-to-digital converters. The main shortcomings interfering a solution of this task including the field of optoelectronic analog-to-d…
View article: Calculation of the Parameters for a Superconducting Thin Plate within Ginzburg-landau Theory
Calculation of the Parameters for a Superconducting Thin Plate within Ginzburg-landau Theory Open
The behavior of a superconducting plate with transport current in a magnetic field parallel to its surface was studied by using numerical solution of Ginzburg-Landau (GL) equations. Boundary conditions for the order parameter in their gene…