Material Specification for Y:123; [Y-Ba(La)-Cu-O]
Process: Solid State Reaction
Notes: The authors cite J.J. Neumeier, Appl. Phys. Lett., Vol. 61, 1852 (1992), and summarize the procedure as follows. "Specimens... were prepared as already described except that Al2O3 crucibles were used for the (Y(Ca)-Ba-Cu-O) specimens. Powder x-ray diffraction indicated that all specimens were single phase. Iodometric titration was utilized to determine the oxygen concentration (7-δ) to an estimated accuracy of ±0.01..."
Formula: YBa2-xLaxCu3O7-y
Informal Name: Y:123
Chemical Family: Y-Ba(La)-Cu-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:
Critical Temperature for Y:123; [Y-Ba(La)-Cu-O]
| x (formula units) |
ΔTc (K) |
dTc/dP (K/GPa) |
Critical Temperature (K) |
| 0.00 |
2.0 |
0.47 |
91.3 |
| 0.01 |
1.3 |
-- |
92.1 |
| 0.02 |
1.0 |
-- |
92.6 |
| 0.03 |
1.0 |
0.10 |
93.2 |
| 0.04 |
1.0 |
-- |
93.7 |
| 0.05 |
1.0 |
-- |
93.8 |
| 0.06 |
1.0 |
0.36 |
94.1 |
| 0.08 |
1.3 |
0.76 |
94.2 |
| 0.10 |
2.2 |
-- |
93.6 |
| 0.11 |
2.0 |
1.60 |
93.7 |
| 0.12 |
2.2 |
1.83 |
93.3 |
| 0.14 |
3.3 |
2.10 |
92.0 |
Measurement Method: Electrical resistance
"The values of T
c under high pressure were determined by measurements of the electrical resistivity at a frequency of 18 Hz; typical current densities were 30 mA/cm
2. High pressures (P<0.6 gpa) were generated with a he gas compressor and transmitted through a cu-be capillary to the pressure cell in a he flow cryostat. the pressure was constantly monitored during the experiment to an accuracy of ±3 mpa with a calibrated manganin resistor residing at the compressor side of the capillary which is at room temperature... t
z is defined as the temperature at which the electrical resistivity reaches the fraction z of the extrapolated normal-state resistance ( T
c-T
0.5 ) and the transition width ΔT
c-T
0.9-T
0.1..."
Cautions: Evaluated Data
Digitized data were obtained from Figure 1 of the paper.
Material Specification for Y:123; [Y(Ca)-Ba-Cu-O]
Process: Solid State Reaction
Notes: The authors cite J.J. Neumeier, Appl. Phys. Lett., Vol. 61, 1852 (1992), and summarize the procedure as follows. "Specimens... were prepared as already described except that Al2O3 crucibles were used for the (Y(Ca)-Ba-Cu-O) specimens. Powder x-ray diffraction indicated that all specimens were single phase. Iodometric titration was utilized to determine the oxygen concentration (7-δ) to an estimated accuracy of ±0.01..."
Formula: Y1-xCaxBa2Cu3O7-y
Informal Name: Y:123
Chemical Family: Y(Ca)-Ba-Cu-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:
Critical Temperature for Y:123; [Y(Ca)-Ba-Cu-O]
| x (formula units) |
ΔTc (K) |
dTc/dP (K/GPa) |
Critical Temperature (K) |
| 0.000 |
2.0 |
0.47 |
91.3 |
| 0.012 |
2.4 |
-- |
89.7 |
| 0.015 |
1.8 |
-0.13 |
89.9 |
| 0.030 |
3.5 |
-0.50 |
86.7 |
| 0.060 |
4.6 |
-0.56 |
83.5 |
Measurement Method: Electrical resistance
"The values of T
c under high pressure were determined by measurements of the electrical resistivity at a frequency of 18 Hz; typical current densities were 30 mA/cm
2. High pressures (P<0.6 gpa) were generated with a he gas compressor and transmitted through a cu-be capillary to the pressure cell in a he flow cryostat. the pressure was constantly monitored during the experiment to an accuracy of ±3 mpa with a calibrated manganin resistor residing at the compressor side of the capillary which is at room temperature... t
z is defined as the temperature at which the electrical resistivity reaches the fraction z of the extrapolated normal-state resistance ( T
c-T
0.5 ) and the transition width ΔT
c-T
0.9-T
0.1..."
Cautions: Evaluated Data
Digitized data were obtained from Figure 1 of the paper.
