scholarly journals Persistent currents in the presence of a transport current

1995 ◽  
Vol 51 (15) ◽  
pp. 10175-10178 ◽  
Author(s):  
A. M. Jayannavar ◽  
P. Singha Deo
Keyword(s):  
Transport Current ◽  
Persistent Currents

Study of segregation in La1.8Sr0.2CuO4 superconductor by STEM-EDS microanalysis

1987 ◽  
Vol 45 ◽  
pp. 54-55
Author(s):  
T. F. Kelly ◽  
P. J. Lee ◽  
E. E. Hellstrom ◽  
D. C. Larbalestier
Keyword(s):  
Rare Earth ◽  
High Field ◽  
Transport Current ◽  
Total Thickness ◽  
New Class ◽  
Ceramic Superconductors ◽  
Current Densities ◽  
Group Ii ◽  
Eds Microanalysis

Recently there has been much excitement over a new class of high Tc (>30 K) ceramic superconductors of the form A1-xBxCuO4-x, where A is a rare earth and B is from Group II. Unfortunately these materials have only been able to support small transport current densities 1-10 A/cm2. It is very desirable to increase these values by 2 to 3 orders of magnitude for useful high field applications. The reason for these small transport currents is as yet unknown. Evidence has, however, been presented for superconducting clusters on a 50-100 nm scale and on a 1-3 μm scale. We therefore planned a detailed TEM and STEM microanalysis study in order to see whether any evidence for the clusters could be seen.A La1.8Sr0.2Cu04 pellet was cut into 1 mm thick slices from which 3 mm discs were cut. The discs were subsequently mechanically ground to 100 μm total thickness and dimpled to 20 μm thickness at the center.

scholarly journals Persistent Currents in Mesoscopic Connected Rings

2001 ◽  
Vol 86 (14) ◽  
pp. 3124-3127 ◽  
Author(s):  
W. Rabaud ◽  
L. Saminadayar ◽  
D. Mailly ◽  
K. Hasselbach ◽  
A. Benoît ◽  
...  
Keyword(s):  
Persistent Currents

scholarly journals SPECTRAL CORRELATIONS IN DISORDERED MESOSCOPIC METALS AND THEIR RELEVANCE FOR PERSISTENT CURRENTS

1996 ◽  
Vol 10 (28) ◽  
pp. 1397-1406 ◽  
Author(s):  
AXEL VÖLKER ◽  
PETER KOPIETZ
Keyword(s):  
Energy Levels ◽  
Three Dimensional ◽  
Average Density ◽  
Electron Interaction ◽  
Energy Window ◽  
Persistent Currents ◽  
Dependent Part ◽  
The Difference ◽  
Aharonov Bohm ◽  
Grand Canonical

We use the Lanczos method to calculate the variance σ2(E, ϕ) of the number of energy levels in an energy window of width E below the Fermi energy for noninteracting disordered electrons on a thin three-dimensional ring threaded by an Aharonov–Bohm flux ϕ. We confirm numerically that for small E the flux-dependent part of σ2(E, ϕ) is well described by the Altshuler–Shklovskii-diagram involving two Cooperons. However, in the absence of electron–electron interactions this result cannot be extrapolated to energies E where the energy-dependence of the average density of states becomes significant. We discuss consequences for persistent currents and argue that for the calculation of the difference between the canonical- and grand canonical current it is crucial to take the electron–electron interaction into account.

A 4-terminal SQUID controlled by a transport current

1996 ◽  
Vol 46 (S5) ◽  
pp. 2823-2824 ◽  
Author(s):  
B. J. Vleeming ◽  
A. V. Zakarian ◽  
A. N. Omelyanchouk ◽  
R. de Bruyn Ouboter
Keyword(s):  
Transport Current

scholarly journals Stability of persistent currents in spinor Bose-Einstein condensates

2013 ◽  
Vol 88 (5) ◽  
Author(s):  
A. I. Yakimenko ◽  
K. O. Isaieva ◽  
S. I. Vilchinskii ◽  
M. Weyrauch
Keyword(s):  
Persistent Currents ◽  
Bose Einstein

Influence of Transport Current Distribution on AC Transport Current Loss Measurement in an Assembled Conductor

2010 ◽  
Vol 20 (3) ◽  
pp. 1300-1303 ◽  
Author(s):  
Jun Ogawa ◽  
Satoshi Fukui ◽  
Tetsuo Oka ◽  
Takao Sato ◽  
Kazuya Shinkai ◽  
...  
Keyword(s):  
Current Distribution ◽  
Transport Current ◽  
Loss Measurement ◽  
Current Loss

Persistent currents in a one-dimensional disordered ring in the Luttinger model

1997 ◽  
Vol 55 (24) ◽  
pp. 16300-16305 ◽  
Author(s):  
Jia-Lin Zhu ◽  
Xi Chen ◽  
Yoshiyuki Kawazoe
Keyword(s):  
Persistent Currents ◽  
One Dimensional ◽  
Luttinger Model

scholarly journals Measurements and Analysis of AC Losses in HTS Windings of Electrical Machine for Different Operation Modes

2021 ◽  
Vol 11 (6) ◽  
pp. 2741
Author(s):  
Sergey Zanegin ◽  
Nikolay Ivanov ◽  
Vasily Zubko ◽  
Konstantin Kovalev ◽  
Ivan Shishov ◽  
...  
Keyword(s):  
Magnetic Field ◽  
High Temperature ◽  
High Temperature Superconductor ◽  
High Temperature Superconductors ◽  
Transport Current ◽  
Operating Conditions ◽  
Ac Losses ◽  
Electrical Machine ◽  
2Nd Generation ◽  
Motor Mode

The article is devoted to the study of losses in devices based on high-temperature superconductors of the 2nd generation. The complexity of the devices under study increases from a single rack coil to a winding assembled from several coils, and finally to an electric machine operating in generator mode. This is the way to experimentally study the behavior of 2nd generation high temperature superconductor (2G HTS) carrying a transport current in various conditions: self-field, external DC, and AC magnetic field. Attention is also paid to the losses in the winding during its operation from the inverter, which simulates the operating conditions in the motor mode of a propulsion system.

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