scholarly journals ANALYSIS OF THE BENDING STRAIN INFLUENCE ON THE CURRENT-VOLTAGE CHARACTERISTICS OF HTC SUPERCONDUCTING TAPES

2018 ◽  
Vol 8 (1) ◽  
pp. 67-70
Author(s):  
Jacek Sosnowski
Keyword(s):  
Experimental Data ◽  
Theoretical Model ◽  
Liquid Nitrogen ◽  
Qualitative Agreement ◽  
Liquid Nitrogen Temperature ◽  
Experimental Investigations ◽  
Superconducting Tapes ◽  
Bending Strain ◽  
Current Voltage ◽  
Current Voltage Characteristics

Analysis of the influence of the bending strain on the electric properties of the HTc superconducting tapes is presented. The results of experimental investigations in liquid nitrogen temperature of the current-voltage characteristics and critical current of Bi-based tape are given for various bending strain values. Theoretical model of obtained dependences is proposed, while results of numerical calculations are in qualitative agreement with experimental data.

New approach to pancake vortices interaction with nanosized defects in HTc superconductors

2014 ◽  
Vol 28 (16) ◽  
pp. 1450132 ◽  
Author(s):  
J. Sosnowski
Keyword(s):  
Experimental Data ◽  
Theoretical Model ◽  
Diffusion Equation ◽  
Energy Gain ◽  
New Approach ◽  
Magnetic Diffusion ◽  
Current Voltage ◽  
Current Voltage Characteristics ◽  
Pancake Vortices ◽  
Htc Superconductors

In this paper, an elaborated new theoretical model of the interaction of pancake-type vortices with nanosized defects is presented based on the energy gain analysis of the captured pancake vortices in nanosized defects in multilayered HTc superconductors. Current–voltage characteristics have been calculated in static and dynamic cases and compared with experimental data. Dynamical anomalies have been then predicted based on the solution of magnetic diffusion equation, which also well correspond to our previous experimental data.

scholarly journals Inhomogeneity and irreversibility field of superconducting Nb-Ti tapes

2018 ◽  
Vol 185 ◽  
pp. 08004 ◽  
Author(s):  
Valentin Guryev ◽  
Sergey Shavkin ◽  
Vitaly Kruglov
Keyword(s):  
Experimental Data ◽  
Phase Transition ◽  
Upper Critical Field ◽  
Vortex Matter ◽  
Irreversibility Field ◽  
Superconducting Tapes ◽  
Critical Fields ◽  
Current Voltage ◽  
Current Voltage Characteristics ◽  
Upper Critical Fields

Magnetizations and current-voltage characteristics of superconducting tapes from Nb-50% wt.Ti alloy are studied. In the region of external magnetic fields close to the upper critical field, there is a so called irreversibility field, which is often associated with the phase transition of vortex matter. However, in this study it is shown that the whole volume of experimental data can be described if we abandon the hypothesis of a phase transition and go over to the hypothesis of macroscopic inhomogeneity. This hypothesis implies the existence of two superconducting components with different upper critical fields, which naturally arise as a result of the production process.

A new method of determining the transport coefficients for high pressure arcs from experimental data

1969 ◽  
Vol 3 (2) ◽  
pp. 269-280 ◽  
Author(s):  
L. B. Kapp ◽  
P. H. Richards
Keyword(s):  
Experimental Data ◽  
High Pressure ◽  
Computer Program ◽  
Numerical Method ◽  
Temperature Profile ◽  
Transport Coefficients ◽  
New Method ◽  
Radial Temperature ◽  
Current Voltage ◽  
Current Voltage Characteristics

The problem is to determine the electrical and thermal conductivities of high pressure are plasmas from measurements of the current—voltage characteristics of the are and a single radial temperature profile. A new numerical method is described together with the corresponding computer program. The latter is applied to some recent measurements on wall-stabilized nitrogen ares, covering the temperature range 4500—11,000 °K, for which radiation can be neglected, and the results are compared with those of other workers.

Study of Electrical Properties of Ge-Nanocrystalline Films Deposited by Cluster-Beam Evaporation Technique

1998 ◽  
Vol 536 ◽  
Author(s):  
Souri Banedjee ◽  
H. Ono ◽  
S. Nozaki ◽  
H. Morisaki
Keyword(s):  
Electrical Properties ◽  
Liquid Nitrogen ◽  
Coulomb Blockade ◽  
Room Temperature ◽  
Liquid Nitrogen Temperature ◽  
Cluster Beam ◽  
Nanocrystalline Films ◽  
Current Voltage ◽  
Evaporation Technique

AbstractRoom temperature current-voltage (I-V) characteristics were studied across the thickness of the Ge nanocrystalline films, prepared by the cluster beam evaporation technique. The films thus prepared are deposited either at room temperature (Ge-RT) or at liquid nitrogen temperature (Ge-LNT). Ge-LNT nanofilm is subjected to oxidation while Ge-RT did not get oxidized. Steps were observed in the I-V characteristics of the thin Ge- LNT samples suggesting the Coulomb Blockade effect.

SUPERCONDUCTING CABLES – ANALYSIS OF THEIR OPERATION AND APPLICATIONS IN ELECTRIC GRIDS

2016 ◽  
Vol 63 (0) ◽  
pp. 89-96
Author(s):  
Jacek SOSNOWSKI
Keyword(s):  
High Temperature ◽  
Liquid Nitrogen ◽  
Electrical Energy ◽  
Cable Model ◽  
Barrier Formation ◽  
Current Voltage ◽  
Electric Grids ◽  
Pinning Potential ◽  
Current Voltage Characteristics ◽  
Superconducting Cables

In this paper the use of high temperature superconducting cables for transporting electrical energy is analysed. The construction of a short model of a superconducting cable is explained, global progress in this field is examined and related electromagnetic phenomena are discussed, particularly those concerning pinning potential barrier formation. The paper analyses the results of investigations into the current-voltage characteristics of superconducting cable model working in the temperature of liquid nitrogen, allowing to reach the value of critical current equal to 45 A.

scholarly journals Проверка применимости закона полевой эмиссии к исследованию многоострийных полевых эмиттеров методом анализа степени предэкспоненциального множителя напряжения

2019 ◽  
Vol 45 (18) ◽  
pp. 13
Author(s):  
Е.О. Попов ◽  
А.Г. Колосько ◽  
С.В. Филиппов
Keyword(s):  
Experimental Data ◽  
Carbon Nanotubes ◽  
Statistical Analysis ◽  
Field Emission ◽  
Power Law ◽  
Constant Voltage ◽  
Current Voltage ◽  
Power Law Exponent ◽  
Emission Mode ◽  
Current Voltage Characteristics

A method for testing the compliance of experimental current-voltage characteristics with a cold field emission mode is described. The method is based on the variation of voltage power-law exponent in the semilogarithmic coordinates ln (I/U^k) vs1/U, as well as the statistical analysis of experimental data fluctuations. It is shown that the current-voltage characteristics obtained using the high-voltage fast-scanning technique have a better fit to the field emission law than the characteristics given by a slow scanning with a constant voltage. A multi-tip nanocomposite emitter based on carbon nanotubes was taken as a sample. For processing experimental data, it was proposed to use modified Fowler-Nordheim coordinates with a voltage power-law exponent of 1.24.

Dynamic I-V Curves Are Reliable Predictors of Naturalistic Pyramidal-Neuron Voltage Traces

2008 ◽  
Vol 99 (2) ◽  
pp. 656-666 ◽  
Author(s):  
Laurent Badel ◽  
Sandrine Lefort ◽  
Romain Brette ◽  
Carl C. H. Petersen ◽  
Wulfram Gerstner ◽  
...  
Keyword(s):  
Experimental Data ◽  
Theoretical Model ◽  
Neuronal Response ◽  
Pyramidal Cells ◽  
Analytical Models ◽  
Cell Populations ◽  
Cell Type ◽  
Response Properties ◽  
Current Voltage

Neuronal response properties are typically probed by intracellular measurements of current-voltage ( I-V) relationships during application of current or voltage steps. Here we demonstrate the measurement of a novel I-V curve measured while the neuron exhibits a fluctuating voltage and emits spikes. This dynamic I-V curve requires only a few tens of seconds of experimental time and so lends itself readily to the rapid classification of cell type, quantification of heterogeneities in cell populations, and generation of reduced analytical models. We apply this technique to layer-5 pyramidal cells and show that their dynamic I-V curve comprises linear and exponential components, providing experimental evidence for a recently proposed theoretical model. The approach also allows us to determine the change of neuronal response properties after a spike, millisecond by millisecond, so that postspike refractoriness of pyramidal cells can be quantified. Observations of I-V curves during and in absence of refractoriness are cast into a model that is used to predict both the subthreshold response and spiking activity of the neuron to novel stimuli. The predictions of the resulting model are in excellent agreement with experimental data and close to the intrinsic neuronal reproducibility to repeated stimuli.

scholarly journals Charge-state assignment of nanoscale single-electron transistors from their current–voltage characteristics

Nanoscale ◽  
2019 ◽  
Vol 11 (31) ◽  
pp. 14820-14827 ◽  
Author(s):  
Bart Limburg ◽  
James O. Thomas ◽  
Jakub K. Sowa ◽  
Kyle Willick ◽  
Jonathan Baugh ◽  
...  
Keyword(s):  
Charge State ◽  
Liquid Nitrogen ◽  
Single Molecule ◽  
Single Electron ◽  
Single Electron Transistors ◽  
State Assignment ◽  
Current Voltage ◽  
Current Voltage Characteristics ◽  
Electron Transistors ◽  
Single Molecule Transistor

The charge state of a single-molecule transistor can be determined at liquid nitrogen temperatures by simply observing the IV characteristics.

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