Surface characterization of as-grown CeO2 cap layer morphology evolution and critical current density of post-deposited YBCO films

2015 ◽  
Vol 5 (6) ◽  
pp. 534-540 ◽  
Author(s):  
Feng Feng ◽  
Yanyi Zhang ◽  
Timing Qu ◽  
Rongxia Huang ◽  
Shaozhu Xiao ◽  
...  
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Surface Characterization ◽  
Morphology Evolution ◽  
Ybco Films ◽  
Cap Layer

An all-field-range description of the critical current density in superconducting YBCO films

2011 ◽  
Vol 24 (10) ◽  
pp. 105020 ◽  
Author(s):  
I A Golovchanskiy ◽  
A V Pan ◽  
O V Shcherbakova ◽  
S A Fedoseev ◽  
S X Dou
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Field Range ◽  
Ybco Films

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

Fabrication of High Jc YBa2Cu3O7-δ Coated Conductors Using Sol-Gel Buffer Layers On Nickel and Nickel Alloy Substrates

2001 ◽  
Vol 689 ◽  
Author(s):  
S. Sathyamurthy ◽  
M. Paranthaman ◽  
B. W. Kang ◽  
H. Y. Zhai ◽  
T. Aytug ◽  
...  
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Sol Gel ◽  
Rf Sputtering ◽  
Cube Texture ◽  
Dip Coating ◽  
Coated Conductors ◽  
Buffer Layers ◽  
Ybco Films

Sol-gel processing of La2Zr2O7 (LZO) buffer layers on biaxially textured Ni-3 at.% W alloy substrates using a continuous reel-to-reel dip-coating unit has been studied. The epitaxial LZO films obtained have a strong cube texture and uniform microstructure. The effect of increasing the annealing speed on the texture, microstructure and the carbon content retained in the film were studied. On top of the LZO films, epitaxial layers of Yttria Stabilized Zirconia (YSZ) and Ceria (CeO2) were deposited using rf sputtering, and YBa2Cu3Ox (YBCO) films were then deposited using Pulsed Laser Deposition (PLD). A critical current density (Jc) of 1.9 MA/cm2 at 77K and self-field and 0.34 MA/cm2 at 77K and 0.5T have been obtained on these films. These values are comparable to those obtained on YBCO films deposited on all-vacuum deposited buffer layers, and are the highest ever obtained using solution seed layers. The use of all-solution buffers for coated conductor processing has also been explored. A critical current density of 1.1 MA/cm2 at 77 K and self-field was obtained on YBCO films grown be PLD on LZO buffered nickel substrates.

Effect of the microscopic correlated-pinning landscape on the macroscopic critical current density in YBCO films

2000 ◽  
Vol 341-348 ◽  
pp. 1177-1178 ◽  
Author(s):  
G. Ghigo ◽  
A. Chiodoni ◽  
R. Gerbaldo ◽  
L. Gozzelino ◽  
F. Laviano ◽  
...  
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Ybco Films

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.

Comparative Study of Thickness Dependence of Critical Current Density of Yba2Cu3O7–δ on (100) SrTiO3 and on Rolling-assisted Biaxially Textured Substrates

2002 ◽  
Vol 17 (7) ◽  
pp. 1750-1757 ◽  
Author(s):  
B. W. Kang ◽  
A. Goyal ◽  
D. F. Lee ◽  
J. E. Mathis ◽  
E. D. Specht ◽  
...  
Keyword(s):  
Surface Morphology ◽  
Critical Current Density ◽  
Film Thickness ◽  
Comparative Study ◽  
Critical Current ◽  
Current Density ◽  
Pulsed Laser ◽  
Cube Texture ◽  
Laser Deposition ◽  
Ybco Films

We investigated the dependence of critical current density (Jc) on thickness of Yba2Cu3O7−δ (YBCO) films grown by pulsed laser deposition on (100) SrTiO3 (STO) and on rolling-assisted biaxially textured substrates (RABiTS). The thickness of YBCO films varied from 0.19 to 3 μm. The highest Jcs of 5.3 and 2.6 MA/cm2 at 77 K, self-field were obtained for 0.19-μm YBCO films on STO and RABiTS, respectively. Jc was found to decrease exponentially with YBCO thickness on both substrates. However, the results suggest different mechanisms are responsible for the Jc reduction in the two cases. On STO, growth of a-axis grains within c-axis films and broadening of the in-plane texture were observed in thick films. On RABiTS, degradation in cube texture as well as development of a porous surface morphology were found to correlate with film thickness.

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
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