Aligned gadolinium barium copper oxide thick films formed by in situ crystallization in a magnetic field

1993 ◽  
Vol 8 (10) ◽  
pp. 2440-2444 ◽  
Author(s):  
Joanna McKittrick ◽  
Ramiro Contreras ◽  
Dennis Clougherty
Keyword(s):  
Magnetic Field ◽  
Copper Oxide ◽  
Applied Magnetic Field ◽  
Barium Copper Oxide ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia ◽  
Barium Copper ◽  
Axis Alignment ◽  
In Situ Crystallization

Gd-1:2:3 films were synthesized from acetate precursors and spun-on to polycrystalline substrates of yttria-stabilized zirconia. The substrates were fired in air at 500 °C in between each applied coat. After applying 10–30 coats, they were crystallized by heating to 900 °C in Ar or O2 with or without the application of a 1 T magnetic field. The applied magnetic field was found to produce c-axis alignment for films <4 μm. Annealing in argon produced alignment, but the effect was less pronounced than annealing in oxygen. Substrates with films > 20 μm were not aligned for either environment.

Polarization behavior of yttrium barium copper oxide electrodes on yttria-stabilized zirconia electrolytes

1994 ◽  
Vol 29 (11) ◽  
pp. 1175-1182 ◽  
Author(s):  
J.G. Fletcher ◽  
J.T.S. Irvine ◽  
A.R. West ◽  
J.A. Labrincha ◽  
J.R. Frade ◽  
...  
Keyword(s):  
Yttrium Barium Copper Oxide ◽  
Copper Oxide ◽  
Barium Copper Oxide ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia ◽  
Polarization Behavior ◽  
Oxide Electrodes ◽  
Barium Copper ◽  
Yttrium Barium

Magnetic Alignment of Amorphous Coatings of GD:123

1992 ◽  
Vol 275 ◽  
Author(s):  
Joanna McKittrick ◽  
Ramiro Contreras
Keyword(s):  
Magnetic Field ◽  
Aqueous Solutions ◽  
Applied Magnetic Field ◽  
Spin Coating ◽  
Yttria Stabilized Zirconia ◽  
Magnetic Alignment ◽  
Stabilized Zirconia ◽  
Coating Technique ◽  
Axis Alignment ◽  
Amorphous Coatings

ABSTRACTHigh Tc superconducting Gd-Ba-Cu-O materials were synthesized via the acetate precursor process. Aqueous solutions of < 0.6 M of metal cations were applied to substrates of yttria stabilized zirconia. Homogeneous films were applied to the substrates by use of the spin coating technique. The substrates were fired in air at 500°C in between each applied coat. After coating the substrates with 10–30 coats, they were crystallized by heating to 900°C in Ar or O2 with or without a 1 T magnetic field. The applied magnetic field was found to produce c-axis alignment for the thinner coats. Annealing in argon produced alignment but the effect was less pronounced than annealing in oxygen. Substrates with 30 coats were not aligned for either environment.

scholarly journals Flux Penetration Effects in High-Tc SQUIDs

1989 ◽  
Vol 42 (4) ◽  
pp. 401
Author(s):  
GJ SIoggett ◽  
lK Harvey ◽  
L Wieczorek ◽  
RE Binks ◽  
R Driver
Keyword(s):  
Magnetic Field ◽  
Copper Oxide ◽  
Direct Measurement ◽  
Barium Copper Oxide ◽  
Break Junction ◽  
Flux Penetration ◽  
High Tc ◽  
Bulk Ybco ◽  
Barium Copper ◽  
Yttrium Barium

Two experiments pertaining to the effects of intergranular flux penetration in high-Tc yttrium-barium-copper oxide (YBCO) SQUIDs are described. The first is a direct measurement of the flux noise of bulk YBCO exposed to the earth's magnetic field, and the second involves the fabrication and testing of break junction d.c. SQUIDs. Implications of a number of undesirable effects seen in these experiments are discussed.

Fabrication of Biaxially Oriented YBCO on (00l) Biaxially Oriented Yttria-Stabilized-Zirconia on Polycrystalline Substrates

1994 ◽  
Vol 341 ◽  
Author(s):  
Paul Arendt ◽  
Steve Foltyn ◽  
Xin Di Wu ◽  
John Townsend ◽  
Chris Adams ◽  
...  
Keyword(s):  
Ybco Film ◽  
Ion Beam ◽  
Density Measurement ◽  
Barium Copper Oxide ◽  
Yttria Stabilized Zirconia ◽  
Transport Critical Current Density ◽  
Stabilized Zirconia ◽  
Barium Copper ◽  
Yttrium Barium ◽  
Ion Beam Sputter Deposition

AbstractIon-assisted, ion-beam sputter deposition is used to obtain (00l) biaxially oriented films of cubic yttria-stabilized-zirconia (YSZ) on polycrystalline metal substrates. Yttrium-barium-copper-oxide (YBCO) is then heteroepitaxially-pulse-laser deposited onto the YSZ. Phi scans of the films show the full-width-half maxima of the YSZ (202) and the YBCO (103) reflections to be 14° and 10° respectively. Our best dc transport critical current density measurement for the YBCO is 800,000 A/cm2 at 75K and 0T. At 75K, the total dc transport current in a 1 cm wide YBCO film is 23 A.

The low magnetic field properties of superconducting bulk yttrium barium copper oxide-sintered versus partially melted material

1989 ◽  
Vol 2 (4) ◽  
pp. 427-461 ◽  
Author(s):  
R. A. Hein ◽  
H. Hojaji ◽  
A. Barkatt ◽  
H. Shafii ◽  
K. A. Michael ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Yttrium Barium Copper Oxide ◽  
Copper Oxide ◽  
Barium Copper Oxide ◽  
Barium Copper ◽  
Yttrium Barium ◽  
Melted Material ◽  
Low Magnetic Field

In situ determination of the effects of carbon dioxide and other volatile impurities on yttrium barium copper oxide (YBa2Cu3O7-x)

1990 ◽  
Vol 2 (4) ◽  
pp. 416-420 ◽  
Author(s):  
C. Michael Greenlief ◽  
Joseph F. Bringley ◽  
Bruce A. Scott ◽  
Stephen M. Gates ◽  
Steven S. Trail ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Yttrium Barium Copper Oxide ◽  
Copper Oxide ◽  
Barium Copper Oxide ◽  
Barium Copper ◽  
Yttrium Barium ◽  
Volatile Impurities
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