Transport critical current densities in bulk Tl/sub 2/Ba/sub 2/Ca/sub 2/Cu/sub 3/O/sub x/ and polycrystalline-thin-film Tl/sub 2/Ba/sub 2/Ca/sub 1/Cu/sub 2/O/sub x/: dependence on microstructure and neutron irradiation damage

1991 ◽  
Vol 27 (2) ◽  
pp. 1139-1142 ◽  
Author(s):  
M.P. Maley ◽  
G.J. Vogt ◽  
D.S. Phillips ◽  
J.Y. Coulter ◽  
P.N. Arendt ◽  
...  
Keyword(s):  
Thin Film ◽  
Critical Current ◽  
Neutron Irradiation ◽  
Irradiation Damage ◽  
Polycrystalline Thin Film ◽  
Current Densities

Transport Measurements on Superconducting YBa2Cu3O7-δ Thin Film Lines

1989 ◽  
Vol 169 ◽  
Author(s):  
B. H. Moeckly ◽  
D. K. Lathrop ◽  
G. F. Redinbo ◽  
S. E. Russek ◽  
R. A. Buhrman
Keyword(s):  
Magnetic Field ◽  
Thin Film ◽  
Critical Current ◽  
Weak Link ◽  
High Sensitivity ◽  
Weak Links ◽  
Microwave Response ◽  
Field Response ◽  
Current Densities ◽  
Iv Curves

AbstractCritical current densities, magnetic field response, and microwave response have been measured for laser ablated YBa2Cu3O7-δ thin film lines on MgO and SrTiO3 substrates. Films on SrTiO3 have critical current densities > 1 x 106 A/cm2 at 77K and show uniform transport properties in lines of all sizes. Films on MgO have critical current densities which range between 102 and 106 A/cm2 at 77K and show considerable variation from device to device on the same chip. Narrow lines on MgO with low critical current densities show Josephson weak link structure which includes RSJ-like IV curves, microwave induced constant voltage steps, and a high sensitivity to magnetic field. The presence of the Josephson weak links is correlated with small amounts of misaligned grains in films on MgO.

Neutron-irradiation effects on critical current densities in single-crystallineYBa2Cu3O7−δ

1991 ◽  
Vol 43 (4) ◽  
pp. 3091-3100 ◽  
Author(s):  
F. M. Sauerzopf ◽  
H. P. Wiesinger ◽  
W. Kritscha ◽  
H. W. Weber ◽  
G. W. Crabtree ◽  
...  
Keyword(s):  
Critical Current ◽  
Neutron Irradiation ◽  
Irradiation Effects ◽  
Current Densities

Enhancement of transport critical current densities in (Bi,Pb)2Sr2Ca2Cu3O10/Ag tapes at 77 K following fast neutron irradiation

1994 ◽  
Vol 65 (23) ◽  
pp. 3008-3010 ◽  
Author(s):  
Q. Y. Hu ◽  
H. W. Weber ◽  
F. M. Sauerzopf ◽  
G. W. Schulz ◽  
R. M. Schalk ◽  
...  
Keyword(s):  
Fast Neutron ◽  
Critical Current ◽  
Neutron Irradiation ◽  
Fast Neutron Irradiation ◽  
Current Densities

Irreversibility line and critical current densities of an oxycarbonate thin film Ba2Ca3Cu4CO3O8

1995 ◽  
Vol 8 (5) ◽  
pp. 361-365 ◽  
Author(s):  
W Prellier ◽  
J L Allen ◽  
C Prouteau ◽  
C Simon ◽  
B Mercey
Keyword(s):  
Thin Film ◽  
Critical Current ◽  
Irreversibility Line ◽  
Current Densities

High Critical-Current Density Ba2YCu3O7 Thin Films Produced by Coevaporation of Y, Cu, and BaF2

1987 ◽  
Vol 99 ◽  
Author(s):  
P. M. Mankiewich ◽  
R. E. Howard ◽  
W. J. Skocpol ◽  
A. H. Dayem ◽  
A. Ourmazd ◽  
...  
Keyword(s):  
Thin Film ◽  
Critical Current ◽  
High Critical Current Density ◽  
High Quality ◽  
Residual Resistance ◽  
Substrate Interaction ◽  
Transmission Electron ◽  
Zero Resistance ◽  
Current Densities ◽  
Oxygen Addition

ABSTRACTHigh quality films of Ba2YCu3O7 have been made by coevaporation of Y, Cu, and BaF2 and subsequent annealing in oxygen. Addition of water vapor to the annealing gas at high temperatures has been found to greatly reduce the annealing time and, thus the substrate interaction. Transition temperatures (zero resistance) between 89–92 K are routinely obtained on SrTiO3 and cubic zirconia substrates. Critical current densities on SrTiO3 are as high as 106 A/cm2 at 81 K and routinely above 105 A/cm2 at 77 K. Transmission electron microscopy shows that on SrTiO3 the superconducting grains have an epitaxial orientation with respect to the substrate. Persistent current measurements in thin film rings demonstrate the absence of residual resistance in the superconducting state.

Sign in / Sign up

Export Citation Format

Share Document