A5015502663- Physics of Superconductivity and Magnetism
- Superconducting and THz Device Technology
- Atomic and Subatomic Physics Research
- Advanced Thermodynamics and Statistical Mechanics
- Pulsars and Gravitational Waves Research
- Particle Detector Development and Performance
- Magnetic properties of thin films
- Superconducting Materials and Applications
- Cosmology and Gravitation Theories
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Advanced Semiconductor Detectors and Materials
- Quantum Mechanics and Applications
- Theoretical and Computational Physics
- Radiation Detection and Scintillator Technologies
- Relativity and Gravitational Theory
- Quantum chaos and dynamical systems
- Magnetic Properties of Alloys
- Particle physics theoretical and experimental studies
- Magnetic Properties and Applications
- Magneto-Optical Properties and Applications
- Advanced Condensed Matter Physics
- Semiconductor Quantum Structures and Devices
- Metallic Glasses and Amorphous Alloys
- Infrared Target Detection Methodologies
Slovak University of Technology in Bratislava
1990-2021
Institute of Power Engineering
2015
University of Lisbon
2001-2013
University of Oxford
2000
SRON Netherlands Institute for Space Research
1993-1996
Despite that it is widely used as a scintillator at room temperature, the hygroscopicity of NaI complicates its handling and limits application for many purposes, example cryogenic detector. To overcome this problem we study coating materials can act humidity barriers, in particular parylene, polymer be deposited very radiopure, thin conformal layers. In work, several NaI(Tl) samples coated with 2-5 µm parylene-C were tested low temperature. Luminescence spectra under X-ray excitation are...
Abstract We propose to locate transponders and atomic clocks in at least three of the Lagrange points Sun-Earth pair, with aim exploiting time flight asymmetry between electromagnetic signals travelling opposite directions along polygonal loops having their vertices. The is due presence a gravito-magnetic field partly caused by angular momentum Sun, originating from galactic dark halo which Milky Way embedded. list also various opportunities could be associated main objective this Dark Halo...
The expulsion of flux in five type-I materials a slow, continuously decreasing, perpendicular magnetic field provides evidence for the possible existence barrier superconductive transition. variation observed critical fields with temperature yields Ginzburg-Landau parameter determinations which suggests their behavior to be more strongly type I than generally considered.
We examine quantum corrections of time delay arising in the gravitational field a spinning oblate source. Low-energy effects occurring Kerr geometry are derived within framework where general relativity is fully seen as an effective theory. By employing such pattern, radiative modifications metric from energy-momentum tensor source, which at lowest order fields modelled point mass. Therefore, to describe corrected version case source body has finite extension, we introduce hybrid scheme...
We examine the consequences of a cubic term addition to mean-field potential Ginzburg-Landau theory describe first order superconductive phase transitions. Constraints on its existence are obtained from experiment, which used assess impact topological defect creation. find no fundamental changes in either Kibble-Zurek or Hindmarsh-Rajantie predictions.
Abstract Linear thrust generation by a single pin emitter electrode under AC excitation has been studied. Presented are measurements of thruster, in comparison with classical, two electrohydrodynamic thruster. The experiments show comparable for both configurations at low voltage levels, suggesting higher thrust-to-weight ratio thrusters applied voltages. Further, hypothesis creation is proposed.
We examine the radioactive decay of iodine in terms its Kolmogorov entropy, observing a consistency with presence regime deterministic chaos vacuum dynamics.
The geometry of the intermediate state (IS) flux structures type-I superconductors, observed during early stages magnetic penetration induced by an externally applied perpendicular field, is approached in terms minimal surfaces. This approach follows from assumption that a local free energy minimization constraint, for each individual structure, dominates sufficiently spatially separated regions, i.e. when over global predicts very low periodicity sample state.
Starting from an analogy between the Planck-Einstein scale and dual length scales in Ginzburg-Landau theory of superconductivity, assuming that space-time is a condensate neutral fermionic particles with Planck mass, we derive baryonic mass universe. In theoretical framework matter appears to be associated condensation energy gained by spacetime transition its normal (symetric) (less symetric) superconducting-like phase. It shown however critical temperature cannot temperature. Thus leaving...
The paper discusses the possibility of locating four spacecraft in out five Lagrange points Sun-Earth system and exchanging electromagnetic pulses among them. Including stations on Earth, various closed paths for are possible. Time flight measurements would be performed. time difference between right- left-handed circuits is proportional to angular momentum Sun detection effect reach accuracies better than 1% depending accuracy clock. could also used as "artificial pulsars" a relativistic...
Composite superconductor/polymer foils with up to 80% superconductor mass fraction were prepared. The standard YBa2Cu3O7 system and polyvinylchloride chosen as superconducting plastic constituents, respectively. Density measurements showed close ideal volume filling in samples. Full plasticity of samples at room temperature was conserved after numerous thermal cycles. Magnetic maximum magnetization −800 A/m liquid-nitrogen using fraction. No clear signs possible collective (percolative) effects seen.
In this paper we discuss ion-induced ultra fast demagnetization and present an approach for experimental investigation of the following magnetization dynamics. The effect, if confirmed, might have applications in spintronics, micro-scale power generation or communication basic research area ion track formation as a mean to observe thermodynamics tracks. proposed lies using magnetic antenna detection field change induced by stopping converting electrical signal. was confirmed feasible,...
Femtosecond laser-induced magnetization dynamics is a popular research topic, due to its potential applications in fast magnetic storage devices and the field of spintronics. In article we present novel technique for time-resolved measurement femtosecond dynamics, based on inductive sensing by loop antenna. It allows performing investigation highly absorbing samples, samples with patterned surfaces coated thin metallic layer, which are difficult study using optical techniques. To test...
We present the development of a technique for studying laser-induced magnetization dynamics, based on inductive measurement.The could provide simple tool demagnetization in thin films and associated processes, such as Gilbert damping precession.It was successfully tested using nanosecond laser NiZn ferrite samples -after further -it is expected to be useful observation ultra-fast demagnetization.The combination optical excitation measurement enables study dynamics both several micrometre...