Material Specification for Y:123; [Y-Ba-Cu-O]
Process: Liquid Phase Processing
Notes: The authors cite V. Selvamanickam et al., Proc. MRS Meeting, Vol. 169, 279 (1990), and summarize the procedure as follows. "The samples... were fabricated using a liquid-phase processing method..." "In this process, sintered bars of YBa2Cu3Ox were melted vertically at 1100 °C for 10-15 min to decompose the compound into Y2BaCuO5 and liquid. The melt is then cooled slowly through the peritectic transformation temperature at a rate of 1-2 °C/h from 1025 °C to 925 °C. This resulted in the crystallization of plate shaped YBa2Cu3Ox grains oriented over a length of 10-15 mm and a width of 5-10 mm. Following the liquid phase process, the samples were annealed in oxygen for 24 h at each of 500 °C and 400 °C."
Formula: YBa2Cu3O7
Informal Name: Y:123
Chemical Family: Y-Ba-Cu-O
Chemical Class: Oxide
Structure Type:
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:
Critical Current Density for Y:123; [Y-Ba-Cu-O]
| Magnetic Field (T) |
Field Angle from ab plane (degrees) |
Critical Current Density (kA/cm2) |
| 2 |
-104 |
9.1 |
| 2 |
-88 |
9.1 |
| 2 |
-72 |
9.2 |
| 2 |
-58 |
8.9 |
| 2 |
-43 |
8.5 |
| 2 |
-27 |
8.1 |
| 2 |
-10 |
8.3 |
| 2 |
-4 |
12.4 |
| 2 |
-3 |
13.8 |
| 2 |
1 |
18.0 |
| 2 |
2 |
16.1 |
| 2 |
5 |
12.9 |
| 2 |
6 |
10.8 |
| 2 |
13 |
8.8 |
| 2 |
32 |
8.8 |
| 2 |
46 |
9.1 |
| 2 |
59 |
9.4 |
| 2 |
75 |
10.0 |
| 2 |
89 |
9.6 |
| 2 |
104 |
10.1 |
| 5 |
-107 |
4.3 |
| 5 |
-92 |
5.0 |
| 5 |
-75 |
4.2 |
| 5 |
-60 |
5.6 |
| 5 |
-45 |
7.7 |
| 5 |
-29 |
8.4 |
| 5 |
- 9 |
8.8 |
| 5 |
- 2 |
10.0 |
| 5 |
0 |
12.1 |
| 5 |
3 |
9.1 |
| 5 |
11 |
8.4 |
| 5 |
30 |
8.3 |
| 5 |
44 |
7.6 |
| 5 |
59 |
5.6 |
| 5 |
73 |
4.3 |
| 5 |
87 |
5.2 |
| 5 |
103 |
4.3 |
| 7 |
-106 |
0.0 |
| 7 |
-90 |
0.2 |
| 7 |
-74 |
0.0 |
| 7 |
-59 |
0.1 |
| 7 |
-46 |
2.8 |
| 7 |
-30 |
7.5 |
| 7 |
- 9 |
8.1 |
| 7 |
- 1 |
9.2 |
| 7 |
1 |
11.7 |
| 7 |
4 |
9.9 |
| 7 |
11 |
8.5 |
| 7 |
31 |
7.6 |
| 7 |
45 |
3.2 |
| 7 |
59 |
0.3 |
| 7 |
74 |
0.1 |
| 9 |
-48 |
0.2 |
| 9 |
-31 |
4.3 |
| 9 |
-16 |
8.4 |
| 9 |
- 6 |
8.5 |
| 9 |
0.2 |
10.5 |
| 9 |
3 |
9.2 |
| 9 |
6 |
8.8 |
| 9 |
14 |
8.5 |
| 9 |
30 |
4.5 |
| 9 |
43 |
0.2 |
Measurement Method: Critical current measurements
"Samples... were cut from the melt-grown bars by a diamond saw and dry polished to dimensions of approximately 6 mm x 1.7 mm x 0.6 mm. The measurements were carried out with the samples immersed directly in either liquid nitrogen or liquid helium. An electric field criterion of 10 µV/cm was used to determine the critical current. On cycling the field between 8 T and 30 T, the critical current was reversible to within the experimental precision of ±5%. High quality current contacts were made using relatively thick (about 7 µm) silver pads formed by sputter etching the YBa
2Cu
3O
7 surface, sputter depositing about 1 µm of silver, and evaporatively depositing the balance of the silver. Afterward, the silver contact pad was annealed in oxygen for 1 h at 550 °C." "For the high-field data, the magnetic field... was applied perpendicular to the c axis (magnetic field angle = 0°) with a 30 T hybrid superconductor/Bitter magnet. Alignment was within about 5°..."
Cautions: Evaluated Data
Digitized data were obtained from Figure 2 of the paper.
