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.

scholarly journals Influence of He ion etching on superconducting transition temperature and critical current density of Bi1.6Pb0.4Sr2Ca2Cu3Ox.

1994 ◽  
Vol 6 (1) ◽  
pp. 11-13
Author(s):  
Kageyoshi Sakamoto ◽  
Hirokazu Ishii ◽  
Tetsuji Tanihira ◽  
Noriyuki Inoue ◽  
Toshio Shima ◽  
...  
Keyword(s):  
Transition Temperature ◽  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Superconducting Transition Temperature ◽  
Superconducting Transition ◽  
Ion Etching

Characterization of superconducting SmBa2Cu3O7 films grown by pulsed laser deposition

2002 ◽  
Vol 17 (10) ◽  
pp. 2599-2603 ◽  
Author(s):  
Q. X. Jia ◽  
S. R. Foltyn ◽  
J. Y. Coulter ◽  
J. F. Smith ◽  
M. P. Maley
Keyword(s):  
Transition Temperature ◽  
Critical Current Density ◽  
Pulsed Laser Deposition ◽  
Critical Current ◽  
Current Density ◽  
Deposition Temperature ◽  
Pulsed Laser ◽  
Laser Deposition ◽  
Superconducting Transition ◽  
Transition Width

We have investigated epitaxial superconducting SmBa2Cu3O7 (Sm123) films grown by pulsed-laser deposition on single-crystal SrTiO3 substrates. The deposition temperature plays an important role in determining the superconducting properties of Sm123 films. The superconducting transition temperature increases with the deposition temperature whereas the transition width decreases at deposition temperatures in the range of 700–875 °C. A Sm123 film deposited at 850 °C exhibits a transition temperature above 93 K with a transition width less than 0.5 K. Even though Sm123 films exhibit a higher transition temperature than Yba2Cu3O7 (Y123), the Sm123 shows lower critical current density at liquid-nitrogen temperature. The nominal critical current density of Sm123 film is less than 1 MA/cm2 at 75.4 K. Nevertheless, the Sm123 films have less anisotropy and stronger pinning characteristics compared to Y123. They are also much smoother with fewer particulates, as revealed by scanning electron microscopy.

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

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.

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

Anisotropic enhancement of the critical current density of epitaxial YBa2Cu3O7−x films by fast neutron irradiation

1990 ◽  
Vol 169 (1-2) ◽  
pp. 117-122 ◽  
Author(s):  
W. Schindler ◽  
B. Roas ◽  
G. Saemann-Ischenko ◽  
L. Schultz ◽  
H. Gerstenberg
Keyword(s):  
Critical Current Density ◽  
Fast Neutron ◽  
Critical Current ◽  
Neutron Irradiation ◽  
Current Density ◽  
Fast Neutron Irradiation

Characterization of Epitaxial Superconducting YBacuO Thin Films with Three Different Orientations

1989 ◽  
Vol 169 ◽  
Author(s):  
X.K. Wang ◽  
D.X. Li ◽  
S.N. Song ◽  
J.Q. Zheng ◽  
R.P.H. Chang ◽  
...  
Keyword(s):  
Thin Films ◽  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Orientation Dependence ◽  
Zero Field ◽  
Epitaxial Thin Films ◽  
Oriented Film ◽  
Zero Resistance ◽  
Xrd Patterns

AbstractEpitaxial thin films of YBaCuO were prepared by multilayer deposition from Y, Cu, and BaF2 sources with: (1) the a‐axis perpendicular to (100)SrTiO3; (2) the c‐axis perpendicular to (100)SrTiO3; and (3) the [110] axis perpendicular to (110)SrTiO3. XRD patterns as well as SEM and HREM images confirm that the films are highly oriented, essentially epitaxial. Both the a‐axis oriented and the c‐axis oriented films exhibit zero resistance at 91K. The [110] oriented film shows the sharpest transiton with a transition width of IK and zero resistance at 85K. The zero field critical current density, Jc, determined magnetically, is in excess of 107A/cm2 at 4.4K and 1.04 x 106A/cm2 at 77K for the c‐axis oriented film; for the a‐axis oriented film we obtained 6.7 x 106A/cm2 at 4.4K and 1.2 x 105A/cm2 at 77K. The orientation dependence of the critical current density in the basal plane of the a‐axis oriented film was studied. The largest Jc's occur along the in‐plane <100> axes of the substrate.

High Pressure Synthesized Magnesium Diboride- and Dodecaboride-Based Superconductors: Structure and Properties

2010 ◽  
Vol 670 ◽  
pp. 21-27 ◽  
Author(s):  
Tatiana Prikhna ◽  
Wolfgang Gawalek ◽  
Yaroslav Savchuk ◽  
Athanasios G. Mamalis ◽  
Vasiliy Tkach ◽  
...  
Keyword(s):  
High Pressure ◽  
Transition Temperature ◽  
Critical Current Density ◽  
Current Density ◽  
Magnesium Diboride ◽  
Synthesis Temperature ◽  
Superconducting Transition ◽  
Structure And Properties ◽  
Synthesized Materials ◽  
Critical Current Density Jc

The critical current density, jc, of high-pressure synthesized MgB2-based balk materials correlates with the amount and distribution of higher borides (MgB12) and Mg-B-O inclusions, which in tern correlates with the synthesis temperature and presence of additions (Ti, Ta, SiC). High-pressure-synthesized materials with near MgB12 composition of matrix exhibited superconducting transition temperature, Tc, of about 37 K, rather high jc (5∙105 and 103 A/cm2 in 0 T and 3.5 T, respectively, at 20 K) and doubled matrix microhardness: 25±1.1 GPa at 4.9 N –load as compared to materials with MgB2).

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