I. Lyuksyutov - Academia.edu (original) (raw)
Papers by I. Lyuksyutov
Journal of Experimental and Theoretical Physics, 1978
Journal of Experimental and Theoretical Physics, 1978
International Journal of Modern Physics B
We report the properties of superconductivity and Hall effect in 100 nm Pb[Formula: see text]Bi[F... more We report the properties of superconductivity and Hall effect in 100 nm Pb[Formula: see text]Bi[Formula: see text] alloy thin films which were prepared by thermal evaporation with quench condensation using liquid nitrogen. X-ray diffraction indicates the films are [Formula: see text]-phase with peaks shifted to lower angles compared to pure Pb. The [Formula: see text] of the films was higher than those of an amorphous Pb–Bi alloy thin film of the same composition and pure bulk Pb. The resistivity, critical field and critical current density of the thin films are reported. The coherence length ([Formula: see text][Formula: see text]) and London penetration depth ([Formula: see text]) near [Formula: see text] were calculated from the experimental results. The films are in the dirty limit and behave as type-II superconductors with a Ginzburg–Landau parameter of about 10. Additionally, the films show sign reversal in Hall measurements. These films have been quite useful in a comprehensi...
International Journal of Modern Physics B, 2015
We present results on electrochemical fabrication of arrays of magnetic nanostripes atop a Sn fil... more We present results on electrochemical fabrication of arrays of magnetic nanostripes atop a Sn film covered with an insulating Ge layer. We also report its transport properties and superconducting [Formula: see text]. The transport properties demonstrate strong hysteresis as a function of the magnetic field.
Fabrication of ordered nanowire-nanotube hybrid arrays embedded in porous anodic aluminum oxide (... more Fabrication of ordered nanowire-nanotube hybrid arrays embedded in porous anodic aluminum oxide (AAO) membranes is demonstrated. Arrays of TiO2 nanotubes were first deposited into the pores of AAO membranes by an electroless sol-gel technique. For subsequent electrochemical deposition of Co nanowires into the TiO2 nanotubes, a thick Au layer was first evaporated on one surface of the membrane to serve
The Review of scientific instruments, 2012
We describe a pulsed rotating supersonic beam source, evolved from an ancestral device [M. Gupta ... more We describe a pulsed rotating supersonic beam source, evolved from an ancestral device [M. Gupta and D. Herschbach, J. Phys. Chem. A 105, 1626 (2001)]. The beam emerges from a nozzle near the tip of a hollow rotor which can be spun at high-speed to shift the molecular velocity distribution downward or upward over a wide range. Here we consider mostly the slowing mode. Introducing a pulsed gas inlet system, cryocooling, and a shutter gate eliminated the main handicap of the original device in which continuous gas flow imposed high background pressure. The new version provides intense pulses, of duration 0.1-0.6 ms (depending on rotor speed) and containing ∼10(12) molecules at lab speeds as low as 35 m/s and ∼10(15) molecules at 400 m∕s. Beams of any molecule available as a gas can be slowed (or speeded); e.g., we have produced slow and fast beams of rare gases, O(2), Cl(2), NO(2), NH(3), and SF(6). For collision experiments, the ability to scan the beam speed by merely adjusting the ...
Physical review. B, Condensed matter, 1992
ABSTRACT
Physical review. B, Condensed matter, Jan 15, 1992
ABSTRACT The phase transition from the p(2×1) to the (1×1) structure in the O-W(001) system and i... more ABSTRACT The phase transition from the p(2×1) to the (1×1) structure in the O-W(001) system and its critical behavior is studied. Above the critical temperature of the p(2×1) structure ordering into a (1×1) structure is observed. A model for the anomalous ordering and critical behavior is proposed.
Journal of Experimental and Theoretical Physics - J EXP THEOR PHYS, 1978
Physical Review Letters, 1992
ABSTRACT
Bulletin of the American …, 2011
We describe the performance of a new design of the counter-rotating source (CRS) of slow molecule... more We describe the performance of a new design of the counter-rotating source (CRS) of slow molecules introduced originally by Gupta and Herschbach. The CRS produces a supersonic expansion from a nozzle near the tip of a hollow rotor spun at high speed contrary to the ...
Journal of Superconductivity and Novel Magnetism, 2010
ABSTRACT A novel type of magnet–superconductor hybrid is discussed: an array of magnetic nanorods... more ABSTRACT A novel type of magnet–superconductor hybrid is discussed: an array of magnetic nanorods/nanowires embedded into a superconducting film. The general behavior of the phase diagram of this system can be understand in the framework of mean field theory and the hysteresis curve of the magnetic nanostructure. Magnetic nanorods/nanowires can strongly increase vortex pinning and, consequently, the critical current and critical field. The results of experimental and theoretical studies of this new class of superconducting systems are discussed. KeywordsSuperconductivity-Hybrid-Magnetic nanorods-Vortex pinning-Critical field
Journal of Physics: Condensed Matter, 1995
An elastic body moving in a quenched random force environment with a singular force correlator ex... more An elastic body moving in a quenched random force environment with a singular force correlator experiences an additional fridon force which is inversely propoaional to velocity. This dynamicnl friction mechanism is impomnt, e.g., for a moving interface which is subjected to quenched random pinning forces. For sufficiently strong pinning forces, interface motion becomes nnstable at values of driving force smaller than some critical one and the interface velocity dmps. We expect in this case a first-order depinning bansition with hysteresis in the dependence of the interface velocity on driving force. Instability in the interface motion remains under perturbations like an additional periodic driving force or thermal tluctuadons. Interface motion instability clin also take place in systems with small viscosity, when inertial effects are important.
Journal of Physics: Condensed Matter, 1999
Using low-energy electron diffraction (LEED), we show for two classes of systems, which are repre... more Using low-energy electron diffraction (LEED), we show for two classes of systems, which are representative for second-and first-order phase transitions in adsorbed layers, that quantitative properties of phase transitions can be studied also by using integrated diffracted intensities, turning the instrument to low resolution in two-dimensional reciprocal space, k. For the continuous order-disorder phase transitions of several atomic adsorption systems, critical properties have been studied by determination of the critical exponents α (of the specific heat) and η, the anomalous critical dimension, in the limit k ξ 1. We performed systematic tests of the conditions under which these exponents can be determined reliably from the diffracted intensity of superstructure beams. In first-order phase transitions, scaling laws characterize specific mechanisms driving the transitions. As an example of two-dimensional first-order phase transitions, the transitions between a two-dimensional (2D) gas and the 2D solid of the first monolayer have been studied for the noble gases Ar, Kr and Xe on a NaCl(100) surface in quasi-equilibrium with the three-dimensional (3D) gas phase. Using linear temperature ramps, we show that the widths of the hysteresis loops of these transitions as a function of the heating rate, r, scale with a power law ∝ r x with x between 0.4 and 0.5 depending on the system. The hysteresis loops for different heating rates are similar. The island area of the condensed layer was found to grow initially with a time dependence ∝ t 4. These results are in agreement with a model of growth-controlled hysteresis, which predicts x = 0.5 and hysteresis loop similarity.
Europhysics Letters (EPL), 1991
We consider an impure thin superconducting film in its mixed phase with the magnetic field parall... more We consider an impure thin superconducting film in its mixed phase with the magnetic field parallel to the film plane. We show that i) the description of the system of flux lines can be mapped onto a random-field XY-model without vortices; ii) when the mean flux line ...
Europhysics Letters (EPL), 1992
The influence of randomly distributed linear defects (LDs) on the statistical mechanics of flux l... more The influence of randomly distributed linear defects (LDs) on the statistical mechanics of flux line (FL) arrays in superconductors is studied. We have found glassy phase with infinite correlation length along LDs, hexatic glassy phase, lock-in transition with respect to the B tilt from the LD direction. Transport phenomena are analysed.
Applied Physics Letters, 2004
We report diamagnetic levitation of droplets and/or particles of pico-femtoliter volume and demon... more We report diamagnetic levitation of droplets and/or particles of pico-femtoliter volume and demonstrate their on-chip storage and high precision manipulation (translation, merging, assembling and rotation). We also demonstrate a levitation based microfluidic processor to process droplets/particles with up to a billion times smaller volume than in typical microfluidic devices. The levitated particles can be positioned with up to 300 nm accuracy and precisely rotated and assembled, providing a different physical approach for Micro-Electro-Mechanical-Systems. Force can be applied to the droplets/particles via magnetic, electric and gravitational fields with up to femto Newton accuracy, and potential energy can be controlled with up to 0.2 zepto J (0.05 T k B) precision, thus providing experimental tools for fundamental studies.
International Journal of Modern Physics B, 2003
In Magnet/Superconductor Nanostructures it is possible to control magnetism and conductivity at t... more In Magnet/Superconductor Nanostructures it is possible to control magnetism and conductivity at the nanoscale by using localized magnetic fields from structural (dots, stripes, wires) and topological (vortices's, skyrmions and domain walls) textures in magnet and/or superconductor subsystems of the hybrid material. We review experimental and theoretical results in the field of nanostructured magnet/superconductor systems.
Surface Science Letters, 1989
ABSTRACT
Journal of Experimental and Theoretical Physics, 1978
Journal of Experimental and Theoretical Physics, 1978
International Journal of Modern Physics B
We report the properties of superconductivity and Hall effect in 100 nm Pb[Formula: see text]Bi[F... more We report the properties of superconductivity and Hall effect in 100 nm Pb[Formula: see text]Bi[Formula: see text] alloy thin films which were prepared by thermal evaporation with quench condensation using liquid nitrogen. X-ray diffraction indicates the films are [Formula: see text]-phase with peaks shifted to lower angles compared to pure Pb. The [Formula: see text] of the films was higher than those of an amorphous Pb–Bi alloy thin film of the same composition and pure bulk Pb. The resistivity, critical field and critical current density of the thin films are reported. The coherence length ([Formula: see text][Formula: see text]) and London penetration depth ([Formula: see text]) near [Formula: see text] were calculated from the experimental results. The films are in the dirty limit and behave as type-II superconductors with a Ginzburg–Landau parameter of about 10. Additionally, the films show sign reversal in Hall measurements. These films have been quite useful in a comprehensi...
International Journal of Modern Physics B, 2015
We present results on electrochemical fabrication of arrays of magnetic nanostripes atop a Sn fil... more We present results on electrochemical fabrication of arrays of magnetic nanostripes atop a Sn film covered with an insulating Ge layer. We also report its transport properties and superconducting [Formula: see text]. The transport properties demonstrate strong hysteresis as a function of the magnetic field.
Fabrication of ordered nanowire-nanotube hybrid arrays embedded in porous anodic aluminum oxide (... more Fabrication of ordered nanowire-nanotube hybrid arrays embedded in porous anodic aluminum oxide (AAO) membranes is demonstrated. Arrays of TiO2 nanotubes were first deposited into the pores of AAO membranes by an electroless sol-gel technique. For subsequent electrochemical deposition of Co nanowires into the TiO2 nanotubes, a thick Au layer was first evaporated on one surface of the membrane to serve
The Review of scientific instruments, 2012
We describe a pulsed rotating supersonic beam source, evolved from an ancestral device [M. Gupta ... more We describe a pulsed rotating supersonic beam source, evolved from an ancestral device [M. Gupta and D. Herschbach, J. Phys. Chem. A 105, 1626 (2001)]. The beam emerges from a nozzle near the tip of a hollow rotor which can be spun at high-speed to shift the molecular velocity distribution downward or upward over a wide range. Here we consider mostly the slowing mode. Introducing a pulsed gas inlet system, cryocooling, and a shutter gate eliminated the main handicap of the original device in which continuous gas flow imposed high background pressure. The new version provides intense pulses, of duration 0.1-0.6 ms (depending on rotor speed) and containing ∼10(12) molecules at lab speeds as low as 35 m/s and ∼10(15) molecules at 400 m∕s. Beams of any molecule available as a gas can be slowed (or speeded); e.g., we have produced slow and fast beams of rare gases, O(2), Cl(2), NO(2), NH(3), and SF(6). For collision experiments, the ability to scan the beam speed by merely adjusting the ...
Physical review. B, Condensed matter, 1992
ABSTRACT
Physical review. B, Condensed matter, Jan 15, 1992
ABSTRACT The phase transition from the p(2×1) to the (1×1) structure in the O-W(001) system and i... more ABSTRACT The phase transition from the p(2×1) to the (1×1) structure in the O-W(001) system and its critical behavior is studied. Above the critical temperature of the p(2×1) structure ordering into a (1×1) structure is observed. A model for the anomalous ordering and critical behavior is proposed.
Journal of Experimental and Theoretical Physics - J EXP THEOR PHYS, 1978
Physical Review Letters, 1992
ABSTRACT
Bulletin of the American …, 2011
We describe the performance of a new design of the counter-rotating source (CRS) of slow molecule... more We describe the performance of a new design of the counter-rotating source (CRS) of slow molecules introduced originally by Gupta and Herschbach. The CRS produces a supersonic expansion from a nozzle near the tip of a hollow rotor spun at high speed contrary to the ...
Journal of Superconductivity and Novel Magnetism, 2010
ABSTRACT A novel type of magnet–superconductor hybrid is discussed: an array of magnetic nanorods... more ABSTRACT A novel type of magnet–superconductor hybrid is discussed: an array of magnetic nanorods/nanowires embedded into a superconducting film. The general behavior of the phase diagram of this system can be understand in the framework of mean field theory and the hysteresis curve of the magnetic nanostructure. Magnetic nanorods/nanowires can strongly increase vortex pinning and, consequently, the critical current and critical field. The results of experimental and theoretical studies of this new class of superconducting systems are discussed. KeywordsSuperconductivity-Hybrid-Magnetic nanorods-Vortex pinning-Critical field
Journal of Physics: Condensed Matter, 1995
An elastic body moving in a quenched random force environment with a singular force correlator ex... more An elastic body moving in a quenched random force environment with a singular force correlator experiences an additional fridon force which is inversely propoaional to velocity. This dynamicnl friction mechanism is impomnt, e.g., for a moving interface which is subjected to quenched random pinning forces. For sufficiently strong pinning forces, interface motion becomes nnstable at values of driving force smaller than some critical one and the interface velocity dmps. We expect in this case a first-order depinning bansition with hysteresis in the dependence of the interface velocity on driving force. Instability in the interface motion remains under perturbations like an additional periodic driving force or thermal tluctuadons. Interface motion instability clin also take place in systems with small viscosity, when inertial effects are important.
Journal of Physics: Condensed Matter, 1999
Using low-energy electron diffraction (LEED), we show for two classes of systems, which are repre... more Using low-energy electron diffraction (LEED), we show for two classes of systems, which are representative for second-and first-order phase transitions in adsorbed layers, that quantitative properties of phase transitions can be studied also by using integrated diffracted intensities, turning the instrument to low resolution in two-dimensional reciprocal space, k. For the continuous order-disorder phase transitions of several atomic adsorption systems, critical properties have been studied by determination of the critical exponents α (of the specific heat) and η, the anomalous critical dimension, in the limit k ξ 1. We performed systematic tests of the conditions under which these exponents can be determined reliably from the diffracted intensity of superstructure beams. In first-order phase transitions, scaling laws characterize specific mechanisms driving the transitions. As an example of two-dimensional first-order phase transitions, the transitions between a two-dimensional (2D) gas and the 2D solid of the first monolayer have been studied for the noble gases Ar, Kr and Xe on a NaCl(100) surface in quasi-equilibrium with the three-dimensional (3D) gas phase. Using linear temperature ramps, we show that the widths of the hysteresis loops of these transitions as a function of the heating rate, r, scale with a power law ∝ r x with x between 0.4 and 0.5 depending on the system. The hysteresis loops for different heating rates are similar. The island area of the condensed layer was found to grow initially with a time dependence ∝ t 4. These results are in agreement with a model of growth-controlled hysteresis, which predicts x = 0.5 and hysteresis loop similarity.
Europhysics Letters (EPL), 1991
We consider an impure thin superconducting film in its mixed phase with the magnetic field parall... more We consider an impure thin superconducting film in its mixed phase with the magnetic field parallel to the film plane. We show that i) the description of the system of flux lines can be mapped onto a random-field XY-model without vortices; ii) when the mean flux line ...
Europhysics Letters (EPL), 1992
The influence of randomly distributed linear defects (LDs) on the statistical mechanics of flux l... more The influence of randomly distributed linear defects (LDs) on the statistical mechanics of flux line (FL) arrays in superconductors is studied. We have found glassy phase with infinite correlation length along LDs, hexatic glassy phase, lock-in transition with respect to the B tilt from the LD direction. Transport phenomena are analysed.
Applied Physics Letters, 2004
We report diamagnetic levitation of droplets and/or particles of pico-femtoliter volume and demon... more We report diamagnetic levitation of droplets and/or particles of pico-femtoliter volume and demonstrate their on-chip storage and high precision manipulation (translation, merging, assembling and rotation). We also demonstrate a levitation based microfluidic processor to process droplets/particles with up to a billion times smaller volume than in typical microfluidic devices. The levitated particles can be positioned with up to 300 nm accuracy and precisely rotated and assembled, providing a different physical approach for Micro-Electro-Mechanical-Systems. Force can be applied to the droplets/particles via magnetic, electric and gravitational fields with up to femto Newton accuracy, and potential energy can be controlled with up to 0.2 zepto J (0.05 T k B) precision, thus providing experimental tools for fundamental studies.
International Journal of Modern Physics B, 2003
In Magnet/Superconductor Nanostructures it is possible to control magnetism and conductivity at t... more In Magnet/Superconductor Nanostructures it is possible to control magnetism and conductivity at the nanoscale by using localized magnetic fields from structural (dots, stripes, wires) and topological (vortices's, skyrmions and domain walls) textures in magnet and/or superconductor subsystems of the hybrid material. We review experimental and theoretical results in the field of nanostructured magnet/superconductor systems.
Surface Science Letters, 1989
ABSTRACT