Upper critical field, fluctuation conductivity, and dimensionality ofYBa2Cu3O7−x

1988 ◽  
Vol 37 (13) ◽  
pp. 7861-7864 ◽  
Author(s):  
B. Oh ◽  
K. Char ◽  
A. D. Kent ◽  
M. Naito ◽  
M. R. Beasley ◽  
...  
Keyword(s):  
Critical Field ◽  
Upper Critical Field ◽  
Field Fluctuation ◽  
Fluctuation Conductivity

Upper critical field and fluctuation conductivity in Nb-doped strontium titanate thin films

2000 ◽  
Vol 62 (2) ◽  
pp. 1408-1413 ◽  
Author(s):  
Arnold Leitner ◽  
David Olaya ◽  
Charles T. Rogers ◽  
John C. Price
Keyword(s):  
Thin Films ◽  
Strontium Titanate ◽  
Critical Field ◽  
Upper Critical Field ◽  
Fluctuation Conductivity

Excess conductivity analysis in YBa2Cu3O7−d added with SiO2 nanoparticles and nanowires: Comparative study

2016 ◽  
Vol 30 (20) ◽  
pp. 1650242 ◽  
Author(s):  
A. L. Al-Otaibi ◽  
M. A. Almessiere ◽  
M. Ben Salem ◽  
F. Ben Azzouz
Keyword(s):  
Critical Field ◽  
Silicon Oxide ◽  
Mean Field ◽  
Upper Critical Field ◽  
Sio2 Nanoparticles ◽  
Electrical Measurements ◽  
Ginzburg Landau ◽  
Fluctuation Conductivity ◽  
Transmission Electron ◽  
Columnar Defects

The effect of nanosized silicon oxide nanoparticles (denoted NP-SiO2) and nanowires (denoted NW-SiO2) additions during the final processing stage on electrical fluctuation conductivity of polycrystalline YBa2Cu3O[Formula: see text] (Y-123 for brevity) in the mean field region has been reported. Series of samples were synthesized in air using a standard solid-state reaction technique by adding nanosized entities up to 0.5 wt.%. Phases, microstructure and superconductivity properties have been systematically investigated using X-ray diffraction (XRD), transmission electron microscopy (TEM) and electrical measurements. TEM investigations show the presence of inhomogeneities embedded in the superconducting matrix along with the presence of columnar defects in the case of SiO2 nanoparticles added samples, however nanowires tend to agglomerate by entangling with each other in the intergrain regions. The fluctuation conductivity was analyzed as a function of reduced temperature using the Aslamazov–Larkin model. Using the Lawrence–Doniach equations, the Ginzburg–Landau (GL) number (NG) and equations, the coherence length, the effective layer thickness, the lower critical field [Formula: see text], the upper critical field [Formula: see text] and the critical current density [Formula: see text] were estimated. It was found that the addition of an optimum concentration of SiO2 nanomaterials, that depends on the shape, effectively controlled the microstructure, the grains coupling and hence improved the physical properties of Y-123 compound.

scholarly journals Upper critical field and fluctuation conductivity in the critical regime of doped SmFeAsO

2009 ◽  
Vol 79 (10) ◽  
Author(s):  
I. Pallecchi ◽  
C. Fanciulli ◽  
M. Tropeano ◽  
A. Palenzona ◽  
M. Ferretti ◽  
...  
Keyword(s):  
Critical Field ◽  
Upper Critical Field ◽  
Critical Regime ◽  
Fluctuation Conductivity

Enhancement of critical temperature and upper critical field due to Nb substitution in Zr-V alloy superconductors

2020 ◽  
Author(s):  
Sabyasachi Paul ◽  
S. K. Ramjan ◽  
L. S. Sharath Chandra ◽  
Archna Sagdeo ◽  
M. K. Chattopadhyay
Keyword(s):  
Critical Temperature ◽  
Critical Field ◽  
Upper Critical Field

scholarly journals Experimental and theoretical analysis of the upper critical field in ferromagnet–superconductor–ferromagnet trilayers

2013 ◽  
Vol 26 (8) ◽  
pp. 085003 ◽  
Author(s):  
E Antropov ◽  
M S Kalenkov ◽  
J Kehrle ◽  
V I Zdravkov ◽  
R Morari ◽  
...  
Keyword(s):  
Theoretical Analysis ◽  
Critical Field ◽  
Upper Critical Field

scholarly journals Superconductivity with High Upper Critical Field in the Cubic Centrosymmetric η-Carbide Nb4Rh2C1−δ

2021 ◽  
Author(s):  
KeYuan Ma ◽  
Karolina Gornicka ◽  
Robin Lefèvre ◽  
Yikai Yang ◽  
Henrik M. Rønnow ◽  
...  
Keyword(s):  
Critical Field ◽  
Upper Critical Field

Upper Critical Field of New Oxide Superconductor Bi-Sr-Ca-Cu-O

1988 ◽  
Vol 27 (Part 2, No. 4) ◽  
pp. L668-L669 ◽  
Author(s):  
Hiroaki Kumakura ◽  
Hitoshi Shimizu ◽  
Kazuhiko Takahashi ◽  
Kazumasa Togano ◽  
Hiroshi Maeda
Keyword(s):  
Critical Field ◽  
Upper Critical Field ◽  
Oxide Superconductor

Magnetization, upper critical field, and isotropy in single crystals YNi2B2C

1994 ◽  
Vol 235-240 ◽  
pp. 2533-2534 ◽  
Author(s):  
Ming Xu ◽  
B.K. Cho ◽  
P.C. Canfield ◽  
D.K. Finnemore ◽  
D.C. Johnston ◽  
...  
Keyword(s):  
Single Crystals ◽  
Critical Field ◽  
Upper Critical Field
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