scholarly journals Enhancement of in-field critical current density by irradiation of MeV-energy ions in YBCO films prepared by fluorine-free metal-organic deposition

2012 ◽  
Vol 27 ◽  
pp. 276-279 ◽  
Author(s):  
H. Matsui ◽  
H. Ogiso ◽  
H. Yamasaki ◽  
M. Sohma ◽  
I. Yamaguchi ◽  
...  
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Ybco Films ◽  
Metal Organic ◽  
Metal Organic Deposition ◽  
Free Metal

The Effect of Polyethyleneimine (PEI) on the Texture and Morphology of YBCO Films

2013 ◽  
Vol 833 ◽  
pp. 103-106 ◽  
Author(s):  
Wan Chen Xu ◽  
Yue Ling Bai ◽  
Jian Hui Fang ◽  
Chuan Bing Cai
Keyword(s):  
Thin Film ◽  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Precursor Solution ◽  
Superconducting Properties ◽  
Axis Orientation ◽  
Ybco Films ◽  
Metal Organic ◽  
Metal Organic Deposition

The effect of polyethyleneimine (PEI) in precursor solution on the morphology and superconducting properties of YBa2Cu3O7-x (YBCO) films grown on LaAlO3 (LAO) substrates by metal-organic deposition (MOD) method was investigated. The morphologies of the YBCO films were different based on the different amount of PEI addition from 0.25 g to 0.9 g in 10 mL precursor solution. Furthermore, research results indicate that the PEI helps to improve the critical current density (Jc), the uniformity of surface morphology and c-axis orientation of thin film. The highest critical current density (Jc) of 2.17 MA/cm2 at 77 K is obtained in YBCO films fabricated on LAO substrates when the amount of PEI is 0.5 g in 10 mL precursor solution. YBCO layers with about 400 nm in thickness can be processed without cracks and holes during the whole heat treatment, which takes only 7.5 h.

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

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
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