Material Specification for Y:123; [Y-Ba-Cu-O]
Process: Flux Growth
Notes: The authors cite J.P. Rice et al., J. Low Temp. Phys., Vol. 72, 345 (1988), and summarize the procedure as follows. "The crystal was grown by a self-flux method... The crystal was approximately 1.2 mm x 1.2 mm x 50 µm, with a large untwinned region in the center measuring approximately 1 x 1 mm2. Much of the residual twinned region was cleaved off, although some small regions on the edges remained. The crystal was oxygenated initially by annealing at 500 °C in flowing oxygen for 4 days. Gold contacts were then evaporated onto the sample so as to pick out the a or b axis, which had previously been identified by x-ray analysis - here the b axis is parallel to the Cu-O chains. Once the gold was evaporated the sample was annealed for 1 h at 500 °C in flowing oxygen."
Formula: YBa2Cu3O7-x
Informal Name: Y:123
Chemical Family: Y-Ba-Cu-O
Chemical Class: Oxide
Structure Type: Single Crystal
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:
Thermoelectric Power for Y:123; [Y-Ba-Cu-O]
| Direction () |
Temperature (K) |
Thermoelectric Power (µV/K) |
| a-axis |
92.5 |
0.00 |
| a-axis |
92.7 |
0.09 |
| a-axis |
92.8 |
0.77 |
| a-axis |
92.9 |
1.23 |
| a-axis |
93.0 |
1.40 |
| a-axis |
93.3 |
1.57 |
| b-axis |
91.0 |
0.00 |
| b-axis |
91.7 |
-0.55 |
| b-axis |
91.9 |
-1.95 |
| b-axis |
92.0 |
-4.18 |
| b-axis |
94.0 |
-4.82 |
| b-axis |
100.0 |
-5.55 |
| b-axis |
110.0 |
-6.36 |
Measurement Method: Thermopower method
The authors cite M.A. Howson et al., Phys. Rev. B, Vol. 41, 300 (1990), and summarize the procedure as follows. "The thermopower was measured using an ac optical heating technique... the light was passed into the cryostat down an optical fiber and the light source was an ir laser diode which could produce between 5 mW and 18 mW of 780 nm monochromatic light. The light was chopped at a frequency of 29 Hz. The important feature of this technique is the ability to measure the thermopower with great temperature resolution (less than 100 mK)..."
Cautions: Evaluated Data
Digitized data were obtained from Figure 1 of the paper.
