Structural characterization of yttria (Y2O3) inclusions in YBa2Cu3O7−x films: Growth model and effect on critical current density

1993 ◽  
Vol 229 (2) ◽  
pp. 237-248 ◽  
Author(s):  
T.I. Selinder ◽  
U. Helmersson ◽  
Z. Han ◽  
L.R. Wallenberg
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Growth Model ◽  
Current Density ◽  
Structural Characterization

scholarly journals Variable-temperature characterization of NbTi strands in the low critical-current density range

2008 ◽  
Vol 97 ◽  
pp. 012306 ◽  
Author(s):  
L Affinito ◽  
S Chiarelli ◽  
V Corato ◽  
A della Corte ◽  
G De Marzi ◽  
...  
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Variable Temperature ◽  
Density Range ◽  
Current Density Range

High critical current density YBa2Cu3O7–δ coatings on LaMnO3-buffered biaxially textured Cu tapes for coated conductor applications

2003 ◽  
Vol 18 (4) ◽  
pp. 872-877 ◽  
Author(s):  
T. Aytug ◽  
A. Goyal ◽  
N. Rutter ◽  
M. Paranthaman ◽  
J. R. Thompson ◽  
...  
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Morphological Properties ◽  
High Critical Current Density ◽  
Layer Sequence ◽  
Magnetic Analysis ◽  
Cu Substrates ◽  
Hysteretic Loss

High critical current density (high-Jc) YBa2Cu3O7–δ (YBCO) films were obtained by pulsed laser ablation on biaxially textured Cu substrates. To achieve epitaxy of LaMnO3 (LMO) on Cu, thin epitaxial Ni overlayers were deposited on Cu tapes. The structure comprises the layer sequence of YBCO/LMO/Ni/Cu. For 200-nm-thick YBCO, self-field Jc values exceeding 1 × 106 A/cm2 at 77 K were achieved. Characterization of these short prototype conductors revealed good structural and morphological properties. Magnetic analysis suggested that hysteretic loss due to the ferromagnetic Ni overlayer is minimal.

scholarly journals Preparation and characterization of silver clad (Bi, Pb)-Sr-Ca-Cu-O 2223 superconducting tapes with high critical current density

1995 ◽  
Vol 18 (5) ◽  
pp. 517-529 ◽  
Author(s):  
U Syamaprasad ◽  
M S Sarma ◽  
A R Sheeja Nair ◽  
P Guruswamy ◽  
P S Mukherjee ◽  
...  
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Superconducting Tapes ◽  
High Critical Current Density

scholarly journals Toward Wafer Scale Inductive Characterization of Spin-Transfer Torque Critical Current Density of Magnetic Tunnel Junction Stacks

2015 ◽  
Vol 51 (1) ◽  
pp. 1-4 ◽  
Author(s):  
Sibylle Sievers ◽  
Niklas Liebing ◽  
Santiago Serrano-Guisan ◽  
Ricardo Ferreira ◽  
Elvira Paz ◽  
...  
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Tunnel Junction ◽  
Magnetic Tunnel Junction ◽  
Spin Transfer Torque ◽  
Spin Transfer ◽  
Wafer Scale

Development and Characterization of Artificial Microstructures in Long Lengths of Superconducting Wire

1994 ◽  
Vol 351 ◽  
Author(s):  
P. D. Jablonski ◽  
P. J. Lee ◽  
D. C. Larbalestier
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Flux Pinning ◽  
Large Strains ◽  
Second Phase ◽  
Final Size ◽  
New Methods ◽  
Particle Thickness

ABSTRACTConventional Nb-Ti superconductors are optimized by thermal and mechanical treatments which ultimately produce a nanostructure consisting of 1-2nm thick ribbons of α-Ti dispersed in a matrix of β-Nb-Ti. Several groups are now investigating artificial dispersions of second phase in Nb-Ti which may develop stronger flux pinning nanostructures. However, these new methods generally require true strains of 30 or more. We avoid these large strains (and their associated problems) by forming our composites from a mixture ∼ -50¼m size Nb and Nb-Ti powders, thus permitting the desired nanostructure to be produced with strains of order 12. Nb pinning particles were found to develop an irregular shape, tending to nanometer thick ribbons at large strains. The final size nanostructure resembles conventional Nb-Ti, except that the “second” phase is Nb rather than α-Ti. The critical current density (Jc) was found to increase by over two orders of magnitude to peak values of 5490 and 1980A/mm2 at 2 and 5T as the particle thickness was reduced.

INDUCTIVE CHARACTERIZATION OF SUPERCONDUCTING NANO-ENGINEERED ARTIFICIAL CUPRATES

2003 ◽  
Vol 17 (04n06) ◽  
pp. 393-399
Author(s):  
P. G. MEDAGLIA ◽  
P. ORGIANI ◽  
C. ARUTA ◽  
G. BALESTRINO ◽  
A. TEBANO
Keyword(s):  
High Temperature ◽  
Critical Temperature ◽  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Pulsed Laser ◽  
Laser Deposition ◽  
Superconducting Transition ◽  
Engineered Structures

Ultrathin artificial high temperature superconducting structures were grown by pulsed laser deposition stacking in sequence epitaxial layers of ( Ba 0.9 Nd 0.1) CuO 2+x and CaCuO2. Critical temperature Tc and critical current density Jc for such nano-engineered structures consisting of a single (CaCuO2) block sandwiched between two ( Ba 0.9 Nd 0.1) CuO 2+x charge reservoir blocks were measured inductively. The onset of superconducting transition is higher than 50 K. The purely intralayer critical current density was measured at 4.2 K and resulted to be larger than 108 A/cm2.

Characterization of Critical Current Density in Silver-Sheathed Bi-2223 Tape

2005 ◽  
Vol 15 (2) ◽  
pp. 2518-2521 ◽  
Author(s):  
T. Matsushita ◽  
Y. Himeda ◽  
M. Kiuchi ◽  
J. Fujikami ◽  
K. Hayashi
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density
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