A Study on the Temperature Dependence of the Ginzburg-Landau Parameter, Thermodynamic and Upper Critical Field of ${\rm Nb}_{3}{\rm Sn}$ Strands

2007 ◽  
Vol 17 (2) ◽  
pp. 2635-2638 ◽  
Author(s):  
Sangjun Oh ◽  
D.K. Oh ◽  
C.J. Bae ◽  
H.C. Kim ◽  
Keeman Kim
Keyword(s):  
Temperature Dependence ◽  
Critical Field ◽  
Upper Critical Field ◽  
Ginzburg Landau ◽  
Landau Parameter

THE UPPER CRITICAL FIELD OF THIN FILMS OF TWO-BAND SUPERCONDUCTORS: AN APPLICATION TO MgB2

2004 ◽  
Vol 18 (30) ◽  
pp. 1525-1531 ◽  
Author(s):  
I. N. ASKERZADE
Keyword(s):  
Experimental Data ◽  
Thin Films ◽  
Temperature Dependence ◽  
Critical Field ◽  
Qualitative Agreement ◽  
Magnesium Diboride ◽  
Upper Critical Field ◽  
Ginzburg Landau

Temperature dependence of the upper critical field [Formula: see text] of thin films of two-band superconductors is studied using the two-band Ginzburg–Landau (G–L) theory. The results are shown to be in qualitative agreement with experimental data for the superconducting magnesium diboride MgB 2 films.

THE TWO-BAND GINZBURG–LANDAU THEORY ANALYSIS ON THE UPPER CRITICAL FIELD OF Mg1-xAlxB2

2011 ◽  
Vol 25 (22) ◽  
pp. 3035-3042
Author(s):  
MINXIA LIU ◽  
JIANWEN AI ◽  
GUIHUA CHEN ◽  
YONGZHAO XU ◽  
XIDUO HU
Keyword(s):  
Experimental Data ◽  
Temperature Dependence ◽  
Single Crystals ◽  
Critical Field ◽  
Landau Theory ◽  
Upper Critical Field ◽  
Broad Temperature Range ◽  
Anisotropy Ratio ◽  
Theory Analysis ◽  
Ginzburg Landau

We studied the temperature dependence of the upper critical field Hc2(T) of Mg 1-x Al x B 2 single crystals (x=0.024 and 0.092) using the two-band Ginzburg–Landau theory. We found that this theory can describe Hc2(T) very well in the broad temperature range. The values of the parameters obtained by fitting experimental data to the theory indicated that the anisotropy of the σ bands decreased with the Al concentration. Accordingly, the temperature dependence of the anisotropy ratio of Hc2(γH) systematically decreased, and for x=0.092, γH was nearly independent of temperature.

Ginzburg–Landau theory of the Abrikosov vortex state near the upper critical field

1982 ◽  
Vol 60 (3) ◽  
pp. 299-303 ◽  
Author(s):  
A. E. Jacobs
Keyword(s):  
Critical Field ◽  
Landau Theory ◽  
Upper Critical Field ◽  
Vortex State ◽  
Quantization Condition ◽  
Abrikosov Vortex ◽  
Ginzburg Landau ◽  
Type Ii Superconductors ◽  
Flux Quantization ◽  
The Magnetic Field

A method which preserves the flux-quantization condition in all orders of perturbation theory is applied to the Ginzburg–Landau theory of type-II superconductors near the upper critical field. Expansions are obtained for the order parameter, the magnetic field, and the free energy; previous results are verified and extended to one higher order in Hc2 – Ha.

Temperature Dependence of the Upper Critical Field in bcc Solid 3He

2007 ◽  
Vol 148 (5-6) ◽  
pp. 743-747
Author(s):  
Todd E. Sherline ◽  
E. Dwight Adams ◽  
Yasu Takano
Keyword(s):  
Temperature Dependence ◽  
Critical Field ◽  
Upper Critical Field ◽  
Solid 3He
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