scholarly journals New Measurements of the Transition to the Normal State Induced by High Current Densities in High-Tc Superconductor Microbridges under Thermal Smallness Conditions

2014 ◽  
Vol 95 ◽  
pp. 202-206 ◽  
Author(s):  
J.M. Doval ◽  
J. Maza ◽  
C. Torron ◽  
J.A. Veira ◽  
M. Tello ◽  
...  

We address here the superconductivity quenching under an external magnetic field of amplitudes up to 1 T and in the so-called "thermal smallness" condition, when the microbridge width becomes smaller than the thermal diffusion length of both the own superconductor and its refrigerant (the substrate, in the case of thin films), which breaks their thermal dimensional scaling. Our results further support that when the current perturbations have characteristic times in the millisecond range the quenching is due to thermal instabilities associated with regular (nonsingular) flux-flow, and they also suggest how to optimize the refrigeration of practical superconductors.

1994 ◽  
Vol 89 (8) ◽  
pp. 705-708 ◽  
Author(s):  
Gi. Schneider ◽  
P.G. Huggard ◽  
T.P. O'Brien ◽  
W. Blau ◽  
W. Prettl

2006 ◽  
Vol 32 (8) ◽  
pp. 832-837 ◽  
Author(s):  
M. P. Chornomorets ◽  
D. G. Kovalchuk ◽  
S. M. Ryabchenko ◽  
A. V. Semenov ◽  
E. A. Pashitskii

AIP Advances ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 045217 ◽  
Author(s):  
V. Vesterinen ◽  
S. Ruffieux ◽  
A. Kalaboukhov ◽  
H. Sipola ◽  
M. Kiviranta ◽  
...  

1989 ◽  
pp. 557-559 ◽  
Author(s):  
Yu. V. Guliaev ◽  
I. M. Kotelianskii ◽  
V. B. Kravchenko ◽  
V. A. Luzanov ◽  
A. T. Sobolev

1987 ◽  
Vol 01 (02) ◽  
pp. 413-417
Author(s):  
J.D. Hettinger ◽  
A.G. Swanson ◽  
J.S. Brooks ◽  
Y.P. Ma

We have measured the transition temperature, critical field, magnetoresistance, and Hall effect for the high temperature superconductor Y-Ba-Cu-O in magnetic fields up to 23T in the temperature range 4.2 to 125K. Meissner studies at zero magnetic field were also performed in some cases. We find a strong dependence of these parameters on the relative percentage of the correct phase of Y-Ba-Cu-O in the sample. We report new results on magnetoresistance and Hall effect in these materials.


1962 ◽  
Vol 13 (3) ◽  
pp. 465-477 ◽  
Author(s):  
D. W. George ◽  
H. K. Messerle

Using an electrically driven shock tube with initial pressures of 0.1 to 1.0 mm Hg and shock speeds of about Mach 12 to 15, the resistance of an air plasma between two parallel probes has been measured by two different techniques and the results compared. In one, external voltages of from 0 to 100 V were applied to the probes and in the other, electromagnetically induced voltages of from 0 to 25 V were produced by the plasma's motion in a magnetic field of up to 3500 G. In either case the resistance was found to decrease as the current flow increased and was consistent with the equilibrium electronic conductivity of the air plasma at high current densities.


2020 ◽  
Vol 1559 ◽  
pp. 012055 ◽  
Author(s):  
Nicola Pompeo ◽  
Andrea Alimenti ◽  
Kostiantyn Torokhtii ◽  
Giulia Sylva ◽  
Valeria Braccini ◽  
...  

1990 ◽  
Author(s):  
R. D. Vispute ◽  
S. T. Bendre ◽  
R. R. Viswanathan ◽  
S. M. Chaudhari ◽  
S. M. Kanetkar ◽  
...  

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