Critical Current Enhancement in Single-Crystal Ba2Ycu3O7

1989 ◽  
Vol 169 ◽  
Author(s):  
R. B. van Dover ◽  
E. M. Gyorgy ◽  
L. F. Schneemeyer ◽  
A. E. White ◽  
S. Glarum ◽  
...  
Keyword(s):  
Critical Current Density ◽  
Single Crystal ◽  
Fast Neutron ◽  
Single Crystals ◽  
Critical Current ◽  
Neutron Irradiation ◽  
Current Density ◽  
Proton Irradiation ◽  
Significant Enhancement ◽  
Fast Neutron Irradiation

AbstractThe critical current density, Jc, of single crystals of Ba2YCu3O7 is comparable to that of melt-textured-growth materials as well as to the intragrain Jc of bulk polycrystalline Ba2YCu3O7. Typical values at 77 K and 9 kOe are near 5x 103 A/cm2, and are presumably limited by weak pinning. We have obtained a significant enhancement of this pinning-limited Jc by three techniques: 1) a short reannealing procedure, 2) fast neutron irradiation, and 3) proton irradiation. Interestingly, the combination of the first technique followed by either irradiation is not as effective as the iradiation alone. That is, the best candidates for irradiation are not necessarily those with the highest initial Jc.

Magnetization studies of the influence of fast neutron irradiation on critical current density of melt‐textured YBa2Cu3O7−x

1992 ◽  
Vol 61 (17) ◽  
pp. 2102-2104 ◽  
Author(s):  
R. Puźniak ◽  
A. Wiśniewski ◽  
H. Szymczak ◽  
Jingrong Wang ◽  
Pingxiang Zhang ◽  
...  
Keyword(s):  
Critical Current Density ◽  
Fast Neutron ◽  
Critical Current ◽  
Neutron Irradiation ◽  
Current Density ◽  
Fast Neutron Irradiation

Effect of Fast Neutron Irradiation on Critical Current Density of Nb-Ti Alloy for Fusion Reactor

1974 ◽  
Vol 11 (2) ◽  
pp. 77-79
Author(s):  
Hiroshi TSUBAKIHARA ◽  
Touichi OKADA ◽  
Tokuo SUITA ◽  
Takefumi HORIUCHI ◽  
Kiyoshi MATSUMOTO ◽  
...  
Keyword(s):  
Critical Current Density ◽  
Fast Neutron ◽  
Critical Current ◽  
Neutron Irradiation ◽  
Current Density ◽  
Fusion Reactor ◽  
Ti Alloy ◽  
Fast Neutron Irradiation

Large Enhancement of JC in YBacuo Single Crystals Induced by Proton Irradiation

1989 ◽  
Vol 169 ◽  
Author(s):  
L. Civale ◽  
A.D. Marwick ◽  
M.W. Mcelfresh ◽  
A.P. Malozemoff ◽  
F. Holtzberg
Keyword(s):  
Critical Current Density ◽  
Single Crystal ◽  
Single Crystals ◽  
Critical Current ◽  
Current Density ◽  
Proton Irradiation ◽  
Fold Increase ◽  
Unirradiated Sample ◽  
Maximum Value ◽  
Large Enhancement

AbstractWe have used magnetization measurements to study the effect of proton irradiation on the critical current density of a YBaCuO single crystal. We have obtained a maximum value of 1.5x105 A/cm2 at 77 K and 1 T at a fluence of 2 x 1016 cm-2, representing a 50-fold increase with respect to the unirradiated sample.

Radiation Damage in YBa2Cu3O7 by Fast Neutrons

1987 ◽  
Vol 99 ◽  
Author(s):  
J. O. Willis ◽  
J. R. Cost ◽  
R. D. Brown ◽  
J. D. Thompson ◽  
D. E. Peterson
Keyword(s):  
Transition Temperature ◽  
Critical Current Density ◽  
Fast Neutron ◽  
Critical Current ◽  
Current Density ◽  
Superconducting Transition Temperature ◽  
Fast Neutrons ◽  
Zero Field ◽  
Superconducting Transition ◽  
Fast Neutron Irradiation

ABSTRACTThe superconducting transition temperature of sintered YBa2Cu3O7 decreases at a rate of 2.7 K/1018 n/cm2 (E > 0.1 MeV) for fast neutron irradiation. The critical current density Jc increases a factor of three at zero field and more than three at nonzero fields for fluences up to 2×1018 n/cm2. At both 7 and 75 K, Jc is decreasing with fluence near 3×1018 n/cm2.

Dependence of Critical Current Density on Granular Arrangement in Ceramic Superconductors

1992 ◽  
Vol 275 ◽  
Author(s):  
Jui H. Wang ◽  
Zhifeng Ren
Keyword(s):  
Electron Transport ◽  
Critical Current Density ◽  
Single Crystal ◽  
Single Crystals ◽  
Critical Current ◽  
Current Density ◽  
Average Rate ◽  
Weak Links ◽  
Ceramic Superconductors ◽  
Special Cases

ABSTRACTThe critical current density Jc of bulk ceramic superconductors is often several orders of magnitude lower than that of a single crystal or oriented fílm of the same material due to the weak links residing at the boundaries between single crystals within the ceramic sample. Assuming that the rate of electron transport within each single crystal is much faster than the average rate of electron transport between adjacent single crystals, a working hypothesis of Jc enhancement by granular reorientation is formulated which includes the“brickwall”model and melt-texturing as special cases with long-range granular alignment which usually leads to rigid and brittle bulk samples. Simple geometric considerations show that only short-range local granular alignment is necessary for high Jc. For mis reason, it should be possible to make flexible superconducting wires and tapes for commercial applications at or above 77K.

scholarly journals Enhancement of critical current density in CaKFe4As4 single crystals through 3 MeV proton irradiation

2020 ◽  
Vol 33 (2) ◽  
pp. 025008 ◽  
Author(s):  
N Haberkorn ◽  
M Xu ◽  
W R Meier ◽  
S Suárez ◽  
S L Bud’ko ◽  
...  
Keyword(s):  
Critical Current Density ◽  
Single Crystals ◽  
Critical Current ◽  
Current Density ◽  
Proton Irradiation
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