Material Specification for Y:123; [Y-Ba-Cu-O]
Process: Solid State Reaction
Notes: "The superconducting films were grown in a commercial-scale vertical stainless steel metalorganic chemical vapor deposition reactor (Emcore Corp.). Substrates of (100) LaAlO3 and (100) SrTiO3 were heated resistively on a high-speed rotating disk susceptor. Yttrium, barium, and copper derivatives of 2,2,6,6-tetramethyl-3,5-heptanedione (thd, Strem Chemicals) were used as organometallic sources for transport of the metals into the growth chamber. Individual source bubblers were heated and controlled to within 0.1 °C for accurate compositional control. Source temperatures for Y(thd)3, Ba(thd)2, and Cu(thd)2 were 118, 215, and 123 °C, respectively. Argon (99.999%) flowing through a titanium purifier was used as the carrier gas... During growth, the substrate temperature was held at 775 °C (as measured behind the susceptor with a thermocouple). Nitrous oxide... was used as an oxidizing source, and admitted through the top of the growth chamber. At the conclusion of film growth, the growth chamber was backfilled with O2 (99.994%) and slowly cooled to room temperature... The films grew epitaxially with c-axis orientation with c=11.69(1) σ, indicating complete oxidation..."
Formula: YBa2Cu3O7-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:
Surface Resistance for Y:123; [Y-Ba-Cu-O]
| Temperature (K) |
Surface Resistance (mΩ) |
| 21 |
4.9 |
| 41 |
6.1 |
| 55 |
6.2 |
| 75 |
7.8 |
| 85 |
31 |
| 87 |
325 |
| 88 |
1500 |
| 94 |
2000 |
Measurement Method: Microwave cavity method
The authors cite H.S. Newman et al., IEEE Trans. Magn., Vol. 27, 2540 (1991), and summarize the procedure as follows. "Microwave surface resistance of 4000-σ-thick films deposited on both SrTiO
3 and LaAlO
3 were measured from 20 K to 100 K at 36 GHz in a copper cavity using an endwall replacement technique."
Cautions: Evaluated Data
Digitized data were obtained from Figure 3 of the paper.
Results from the two substrates were not significantly different on the digitized interval.
Magnetic Susceptibility for Y:123; [Y-Ba-Cu-O]
| Substrate () |
Temperature (K) |
Magnetic Susceptibility (arbitrary) |
| LaAlO3 |
85.3 |
1.19 |
| LaAlO3 |
86.1 |
1.16 |
| LaAlO3 |
87.1 |
1.16 |
| LaAlO3 |
87.3 |
1.20 |
| LaAlO3 |
87.8 |
1.16 |
| LaAlO3 |
88.2 |
1.20 |
| LaAlO3 |
88.4 |
1.26 |
| LaAlO3 |
88.7 |
1.54 |
| LaAlO3 |
90.2 |
2.42 |
| LaAlO3 |
92.7 |
2.42 |
| LaAlO3 |
94.0 |
2.43 |
| SrTiO3 |
85.1 |
1.16 |
| SrTiO3 |
86.1 |
1.17 |
| SrTiO3 |
87.0 |
1.18 |
| SrTiO3 |
87.8 |
1.19 |
| SrTiO3 |
88.1 |
1.17 |
| SrTiO3 |
88.7 |
1.19 |
| SrTiO3 |
89.0 |
1.27 |
| SrTiO3 |
89.1 |
1.45 |
| SrTiO3 |
89.3 |
2.20 |
| SrTiO3 |
90.1 |
2.39 |
| SrTiO3 |
91.0 |
2.40 |
| SrTiO3 |
92.1 |
2.41 |
| SrTiO3 |
93.2 |
2.39 |
| SrTiO3 |
94.1 |
2.40 |
Measurement Method: Ac susceptibility
Cautions: Unevaluated Data
No measurement details were noted.
Digitized data were obtained from Figure 2 of the paper.
