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

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.

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

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.

AC losses of Ag-(Bi,Pb)SrCaCuO-2223 tapes in combination of transverse external magnetic field and transport current

1995 ◽  
Vol 5 (2) ◽  
pp. 709-712 ◽  
Author(s):  
M. Ciszek ◽  
B.A. Glowacki ◽  
S.P. Ashworth ◽  
A.M. Campbell ◽  
J.E. Evetts
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Transport Current ◽  
Ac Losses

Asymmetric critical currents of Nb and YBCO thin films for the polarity of the transport current in parallel magnetic fields

1994 ◽  
Vol 235-240 ◽  
pp. 3095-3096
Author(s):  
F. Ichikawa ◽  
T. Nishizaki ◽  
K. Yamabe ◽  
Y. Yamasaki ◽  
T. Fukami ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetic Fields ◽  
Critical Currents ◽  
Transport Current ◽  
Ybco Thin Films ◽  
Parallel Magnetic Fields

Estimation of AC transport current loss generated in Bi2223 bulk for fault current limiter

2002 ◽  
Vol 378-381 ◽  
pp. 823-826 ◽  
Author(s):  
T. Noda ◽  
H. Shimizu ◽  
Y. Yokomizu ◽  
T. Matsumura ◽  
N. Murayama
Keyword(s):  
Transport Current ◽  
Fault Current ◽  
Fault Current Limiter ◽  
Current Loss ◽  
Current Limiter

MAGNETIC FIELD DEPENDENCE OF CRITICAL CURRENTS IN SUPERCONDUCTING POLYCRYSTALS

1992 ◽  
Vol 06 (03) ◽  
pp. 161-169 ◽  
Author(s):  
K.I. KUGEL ◽  
T. YU. LISOVSKAYA ◽  
R.G. MINTS
Keyword(s):  
Magnetic Field ◽  
Magnetic Field Dependence ◽  
Asymptotic Form ◽  
Critical Currents ◽  
Transport Current ◽  
Wide Field ◽  
London Penetration Depth ◽  
Field Range ◽  
Crystallographic Axes ◽  
The Magnetic Field

We study the dependence of critical current j c on magnetic field H in superconducting polycrystals which are considered as systems of superconducting crystallites (isotropic or anisotropic) with Josephson contacts between them. Isotropy or anisotropy of contacts depends on the orientation of their crystallographic axes relatively to edges of contact planes. It is shown that for a system of randomly oriented isotropic contacts, the dependence j c (H) in a relatively wide field range has the asymptotic form j c ~( ln H)/H2. This differs drastically from j c (H) for single contacts. Anisotropy effects due to large differences in London penetration depth λ values corresponding to external magnetic field directed along different axes are analyzed in detail. It is shown that for uniaxal crystals with λ1=λ2≪λ3, this anisotropy leads to the relation [Formula: see text] for chaotic orientation of crystallites. The form of j c (H) curves for two different orientations of the magnetic field relatively to the transport current through the sample is found.

High‐frequency harmonics generation by Bi2Sr2Ca2Cu3Oyceramic carrying alternating transport current

1994 ◽  
Vol 65 (4) ◽  
pp. 487-489 ◽  
Author(s):  
A. M. Grishin ◽  
V. N. Korenivski ◽  
K. V. Rao ◽  
A. N. Ulyanov
Keyword(s):  
High Frequency ◽  
Transport Current ◽  
Harmonics Generation
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