Hts Logo

NIST High Temp. Superconducting Materials (HTS) Database:

NIST Standard Reference Database 62

Last Update to Data Content: 1996

DOI: https://doi.org/10.18434/T4KP8J

Bibliographic Information

Title: Flux Creep and High-Field Critical Currents in Epitaxial Thin Films of YBa2Cu3O7
Author(s): J.D. Hettinger, A.G. Swanson, W.J. Skocpol, J.S. Brooks, J.M. Graybeal, P.M. Mankiewich, R.E. Howard, et al.
Publication: Physical Review Letters Volume: 62 Issue: 17 Year: 1989 Page(s): 2044-2047
Editor(s): Not Available
Publisher: American Physical Society
Language: English
Notes: et al. = B.L. Straughn and E.G. Burkhardt
Keywords: Material Specification, Critical Current Density

Materials and Properties

Y:123; [Y-Ba-Cu-O]
Material Specification for Y:123; [Y-Ba-Cu-O] Process: Evaporation
Notes: "Our films are fabricated by coevaporation of Y, Cu, and BaF2 in an O2 atmosphere on room-temperature SrTiO3 substrates, followed by an 800 °C anneal in wet oxygen and a 550 °C anneal in dry oxygen. They typically have a very high degree of epitaxial order, consisting almost entirely (>90%) of crystals with the c-axis perpendicular to the substrate (copper oxide planes parallel to the substrate)."
Formula: YBa2Cu3O7
Informal Name: Y:123
Chemical Family: Y-Ba-Cu-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form: Thin Film

Critical Current Density for Y:123; [Y-Ba-Cu-O]
Magnetic Field (T) Temperature (K) Critical Current Density (kA/cm2)
14 20 575
15 20 515
7.8 30 550
12 30 415
15 30 330
4.0 40 590
8.2 40 355
15 40 185
2.6 50 560
6.2 50 270
11 50 140
15 50 69
0.94 63 540
3.3 63 200
5.5 63 150
15 63 8.2
0.14 78 560
0.45 78 230
2.4 78 25
3.9 78 4.2
0.02 84 390
0.29 84 91
0.99 84 17
1.7 84 1.2
0.02 87 150
0.10 87 67
0.39 87 18
0.48 87 9.2
Measurement Method: Four-probe method
"In order to measure large values of Jc, we pass current through a scratched microbridge (about) 100 µm wide. If the current flow is macroscopically inhomogeneous, this will cause us to underestimate Jc. Low-resistance four-terminal contacts were made with indium pressed on 1-mm gold dots evaporated directly on the film surface."

Cautions: Evaluated Data
Digitized data were obtained from Fig. 2 of the paper.