NIST High Temp. Superconducting Materials (HTS) Database

Bibliographic Information

Title: High-Temperature Superconductivity in Ultrathin Films of Y₁Ba₂Cu₃O_7-x
Author(s): T. Venkatesan, X.D. Wu, B. Dutta, A. Inam, M.S. Hegde, D.M. Hwang, C.C. Chang, L. Nazar, and B. Wilkens
Publication: Applied Physics Letters Volume: 54 Issue: 6 Year: 1989 Page(s): 581-583
Editor(s): Not Available
Publisher: American Institute of Physics
Language: English
Notes: Not Available
Keywords: Material Specification, Critical Current Density

Materials and Properties

Material Specification for Y:123; [Y-Ba-Cu-O] Process: Solid State Reaction
Notes: The authors cite A. Inam et al., Appl. Phys. Lett., Vol. 53, 908 (1988), and summarize the procedure as follows. "... we performed the deposition in oxygen pressures of (13.3 Pa = 100 mTorr)... Subsequent to deposition the films were allowed to cool to room temperature in about (26.7 kPa = 200 Torr) of oxygen." The films were grown on SrTiO₃ substrates.
Formula: YBa₂Cu₃O_7-x
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:

Critical Current Density for Y:123; [Y-Ba-Cu-O]

Film Thickness (σ)	Temperature (K)	Critical Current Density (kA/cm²)
1000	81	3480
1000	82	2610
1000	83	2150
1000	84	1780
1000	85	1210
1000	86	750
1000	87	350
1000	88	110
500	76	1780
500	77	1620
500	78	1615
500	79	1330
500	80	1210
500	82	1000
500	84	560
500	87	130
500	88	35
300	76	825
300	77	680
300	78	510
300	79	290
300	80	160
300	81	70
100	12	100
100	18	100
100	28	90
100	31	80
100	37	70
100	43	60
100	48	50
100	53	40
100	58	20
100	64	15
100	70	5
100	75	1
100	76	0.8
100	77	0.4
100	78	0.1

Measurement Method: Current density measurements
"Transport measurements were made by painting silver ink contacts on the film. To measure critical current densities a constriction was produced using a diamond scribe. The width of the constriction (typically 50 µm) was measured with an optical microscope."

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