scholarly journals Visualizing the mechanism that determines the critical current density in polycrystalline superconductors using time-dependent Ginzburg-Landau theory

2008 ◽  
Vol 77 (17) ◽  
Author(s):  
George J. Carty ◽  
Damian P. Hampshire
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Landau Theory ◽  
Time Dependent ◽  
Ginzburg Landau ◽  
Polycrystalline Superconductors

TEMPERATURE DEPENDENCE OF THE CRITICAL CURRENT DENSITY OF SUPERCONDUCTORS IN TWO-BAND GINZBURG–LANDAU THEORY: APPLICATION TO MgB2

2004 ◽  
Vol 18 (13) ◽  
pp. 1931-1936 ◽  
Author(s):  
I. N. ASKERZADE
Keyword(s):  
Critical Current Density ◽  
Temperature Dependence ◽  
Critical Current ◽  
Current Density ◽  
Magnesium Diboride ◽  
Landau Theory ◽  
Ginzburg Landau ◽  
Theory Application ◽  
Gl Theory ◽  
Good Agreement

Temperature dependence of the critical current density j c (T) for the superconducting magnesium diboride MgB 2 is studied in the vicinity of T c by using a two-band Ginzburg–Landau (G–L) theory. The result is in good agreement with experimental data for a bulk MgB 2. Comparision of obtained results with single-band GL theory are presented.

scholarly journals Time-Dependent Ginzburg-Landau Simulation of Critical Current Density Including z-axis Anisotropy

2021 ◽  
Vol 1857 (1) ◽  
pp. 012020
Author(s):  
Rina Yonezuka ◽  
Yusei Hamada ◽  
Kazunori Kamiji ◽  
Edmund Soji Otabe ◽  
Yasunori Mawatari ◽  
...  
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Time Dependent ◽  
Ginzburg Landau

Transport Critical Current of Sintered YBa2Cu3Ox in Time-Varying Magnetic Fields

1989 ◽  
Vol 169 ◽  
Author(s):  
P. D. Hambourger ◽  
J. DiCillo ◽  
M. Gibberman ◽  
J. Marino ◽  
L. P. Valek ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Time Dependent ◽  
Time Varying

AbstractThe transport critical current of bulk sintered YBa2Cu3Ox has been measured at 77 K in the presence of static and sinusoidally-time-dependent (10–100 Hz) magnetic fields. In all cases, the field required for a given reduction of critical current density was independent of frequency to within ~10%.

scholarly journals Циркуляционный радиус и плотность критического тока в сверхпроводниках второго рода

2019 ◽  
Vol 45 (2) ◽  
pp. 3
Author(s):  
Д.М. Гохфельд
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Magnetic Measurements ◽  
Length Scale ◽  
Polycrystalline Superconductors

AbstractA method is proposed for estimating the length scale of currents circulating in superconductors. The estimated circulation radius is used for determining the critical current density on the basis of magnetic measurements. The obtained formulas are applicable to samples with negligibly small demagnetizing factors and to polycrystalline superconductors. The proposed method has been verified using experimental magnetization loops measured for polycrystalline YBa_2Cu_3O_7 – δ and Bi_1.8Pb_0.3Sr_1.9Ca_2Cu_3O_ x superconductors.

Ambegaokar-Baratoff–Ginzburg-Landau crossover effects on the critical current density of granular superconductors

1987 ◽  
Vol 35 (13) ◽  
pp. 6637-6642 ◽  
Author(s):  
John R. Clem ◽  
B. Bumble ◽  
S. I. Raider ◽  
W. J. Gallagher ◽  
Y. C. Shih
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Ginzburg Landau ◽  
Crossover Effects ◽  
Granular Superconductors
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