Material Specification for Bi:232; [Bi-Ca(Pr)-Cu-O]
Process: Solid State Reaction
Notes: "The... samples were prepared by solid-state reaction. Stoichiometric amounts of Bi2O3, CaCO3, Pr6O11, R2O3 (R=Nd, Sm, Eu, Gd) and CuO powders with purity better than 99.99% were mixed and ground with mortar and pestle, and calcined at 800 °C in air for 24 h. The calcined powders were ground very well and pressed into pellets before sintering in air at 820-850 °C for 48 h... several grindings were performed during the sintering process. The resulting pellets were finally sintered in flowing oxygen at about 780 °C for 20 h, followed by a slow cooling to room temperature."
Formula: Bi2Ca2.5Pr0.5Cu2O8+x
Informal Name: Bi:232
Chemical Family: Bi-Ca(Pr)-Cu-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:
Crystallography for Bi:232; [Bi-Ca(Pr)-Cu-O]
| Crystal System: | Tetragonal |
| Formula Units per Cell: | |
| Space Group: |
|
Cell Parameters
|
Temp
K
|
a
Å
|
b
Å
|
c
Å
|
| 296 |
5.396 |
-- |
29.987 |
Measurement Method: X-ray diffraction
"The powder X-ray diffraction patterns were obtained with a Rigaku theta-two-theta diffractometer using CuKα radiation and a curved graphite monochromator."
Cautions: Evaluated Data
Digitized data were obtained from Figure 3 of the paper.
Critical Temperature for Bi:232; [Bi-Ca(Pr)-Cu-O]
| Critical Temperature (K) |
| 56 |
Measurement Method: SQUID magnetometer
"Magnetic susceptibility (DC) was measured on bar-shaped samples using a Quantum Design SQUID magnetometer. A magnetic field of (1 mT) was used to measure both shielding and Meissner effects."
Cautions: Evaluated Data
Resistivity (normal state) for Bi:232; [Bi-Ca(Pr)-Cu-O]
| Temperature (K) |
Resistivity (normal state) (mΩ·cm) |
| 36.1 |
0.4 |
| 45.0 |
5.3 |
| 70.0 |
8.2 |
| 137.4 |
8.6 |
| 219.0 |
9.5 |
| 293.0 |
10.0 |
Measurement Method: Four-probe method
"Resistivity was measured using the standard four-probe method." No additional measurement details were noted.
Cautions: Unevaluated Data
Digitized data were obtained from Figure 7 of the paper.
Hall Coefficient for Bi:232; [Bi-Ca(Pr)-Cu-O]
| Sintering Atmosphere () |
Temperature (K) |
Hall Coefficient (mm3 /C) |
| O2 |
64 |
1.77 |
| O2 |
76 |
1.99 |
| O2 |
88 |
2.36 |
| O2 |
100 |
2.45 |
| O2 |
111 |
2.35 |
| O2 |
152 |
2.08 |
| O2 |
193 |
1.94 |
| O2 |
225 |
2.07 |
| O2 |
271 |
1.89 |
| air |
51 |
2.47 |
| air |
101 |
2.86 |
| air |
153 |
2.85 |
| air |
174 |
3.03 |
| air |
226 |
2.79 |
| air |
249 |
2.69 |
| air |
275 |
2.64 |
Measurement Method: Hall effect measurement
"For Hall effect measurements, very good electrical contact was achieved by applying silver paster to the samples, followed by post-annealing in flowing O
2 at about 600 °C for a few hours. The typical contact... resistance was found to be 2-3 Ω."
Cautions: Evaluated Data
Magnetic Susceptibility for Bi:232; [Bi-Ca(Pr)-Cu-O]
| Temperature (K) |
Magnetic Susceptibility (arbitrary) |
| 4.7 |
-30.0 |
| 14.0 |
-30.5 |
| 29.3 |
-28.0 |
| 41.4 |
-15.5 |
| 50.0 |
-3.1 |
| 56.2 |
-0.3 |
| 71.0 |
-0.4 |
Measurement Method: SQUID magnetometer
"Magnetic susceptibility (DC) was measured on bar-shaped samples using a Quantum Design SQUID magnetometer. A magnetic field of (1 mT) was used to measure both shielding and Meissner effects."
Cautions: Evaluated Data
Digitized data were obtained from Figure 6 of the paper.
Material Specification for Bi:232; [Bi-Ca(Sm)-Cu-O]
Process: Solid State Reaction
Notes: "The... samples were prepared by solid-state reaction. Stoichiometric amounts of Bi2O3, CaCO3, Pr6O11, R2O3 (R=Nd, Sm, Eu, Gd) and CuO powders with purity better than 99.99% were mixed and ground with mortar and pestle, and calcined at 800 °C in air for 24 h. The calcined powders were ground very well and pressed into pellets before sintering in air at 820-850 °C for 48 h... several grindings were performed during the sintering process. The resulting pellets were finally sintered in flowing oxygen at about 780 °C for 20 h, followed by a slow cooling to room temperature."
Formula: Bi2Ca2.5Sm0.5Cu2O8+x
Informal Name: Bi:232
Chemical Family: Bi-Ca(Sm)-Cu-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:
Crystallography for Bi:232; [Bi-Ca(Sm)-Cu-O]
| Crystal System: | |
| Formula Units per Cell: | |
| Space Group: |
|
Cell Parameters
|
Temp
K
|
a
Å
|
b
Å
|
c
Å
|
| 296 |
5.407 |
-- |
29.879 |
Measurement Method: X-ray diffraction
"The powder X-ray diffraction patterns were obtained with a Rigaku theta-two-theta diffractometer using CuKα radiation and a curved graphite monochromator."
Cautions: Evaluated Data
Digitized data were obtained from Figure 3 of the paper.
Critical Temperature for Bi:232; [Bi-Ca(Sm)-Cu-O]
| Critical Temperature (K) |
| 59 |
Measurement Method: SQUID magnetometer
"Magnetic susceptibility (DC) was measured on bar-shaped samples using a Quantum Design SQUID magnetometer. A magnetic field of (1 mT) was used to measure both shielding and Meissner effects."
Cautions: Evaluated Data
Resistivity (normal state) for Bi:232; [Bi-Ca(Sm)-Cu-O]
| Temperature (K) |
Resistivity (normal state) (mΩ·cm) |
| 16.0 |
0.8 |
| 22.4 |
6.5 |
| 34.0 |
11.0 |
| 49.4 |
13.0 |
| 88.0 |
12.0 |
| 137.4 |
11.1 |
| 200.5 |
11.0 |
| 246.0 |
11.0 |
| 295.3 |
11.0 |
Measurement Method: Four-probe method
"Resistivity was measured using the standard four-probe method." No additional measurement details were noted.
Cautions: Unevaluated Data
Digitized data were obtained from Figure 7 of the paper.
Hall Coefficient for Bi:232; [Bi-Ca(Sm)-Cu-O]
| Sintering Atmosphere () |
Temperature (K) |
Hall Coefficient (mm3 /C) |
| -- |
47 |
1.80 |
| -- |
53 |
2.02 |
| -- |
73 |
2.20 |
| -- |
91 |
2.33 |
| -- |
99 |
2.23 |
| -- |
125 |
2.32 |
| -- |
151 |
2.31 |
| -- |
174 |
2.35 |
| -- |
197 |
2.26 |
| -- |
223 |
2.25 |
| -- |
246 |
2.16 |
| -- |
172 |
2.01 |
Measurement Method: Hall effect measurement
"For Hall effect measurements, very good electrical contact was achieved by applying silver paster to the samples, followed by post-annealing in flowing O
2 at about 600 °C for a few hours. The typical contact... resistance was found to be 2-3 Ω."
Cautions: Evaluated Data
Magnetic Susceptibility for Bi:232; [Bi-Ca(Sm)-Cu-O]
| Temperature (K) |
Magnetic Susceptibility (arbitrary) |
| 5.1 |
-14.3 |
| 20.0 |
-11.5 |
| 30.0 |
-7.8 |
| 42.0 |
-2.6 |
| 50.0 |
-0.7 |
| 56.2 |
-0.3 |
| 68.1 |
-0.4 |
Measurement Method: SQUID magnetometer
"Magnetic susceptibility (DC) was measured on bar-shaped samples using a Quantum Design SQUID magnetometer. A magnetic field of (1 mT) was used to measure both shielding and Meissner effects."
Cautions: Evaluated Data
Digitized data were obtained from Figure 6 of the paper.
Material Specification for Bi:232; [Bi-Ca(Gd)-Cu-O]
Process: Solid State Reaction
Notes: "The... samples were prepared by solid-state reaction. Stoichiometric amounts of Bi2O3, CaCO3, Pr6O11, R2O3 (R=Nd, Sm, Eu, Gd) and CuO powders with purity better than 99.99% were mixed and ground with mortar and pestle, and calcined at 800 °C in air for 24 h. The calcined powders were ground very well and pressed into pellets before sintering in air at 820-850 °C for 48 h... several grindings were performed during the sintering process. The resulting pellets were finally sintered in flowing oxygen at about 780 °C for 20 h, followed by a slow cooling to room temperature."
Formula: Bi2Ca2.5Gd0.5Cu2O8+x
Informal Name: Bi:232
Chemical Family: Bi-Ca(Gd)-Cu-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:
Crystallography for Bi:232; [Bi-Ca(Gd)-Cu-O]
| Crystal System: | |
| Formula Units per Cell: | |
| Space Group: |
|
Cell Parameters
|
Temp
K
|
a
Å
|
b
Å
|
c
Å
|
| 296 |
5.382 |
-- |
29.709 |
Measurement Method: X-ray diffraction
"The powder X-ray diffraction patterns were obtained with a Rigaku theta-two-theta diffractometer using CuKα radiation and a curved graphite monochromator."
Cautions: Evaluated Data
Digitized data were obtained from Figure 3 of the paper.
Critical Temperature for Bi:232; [Bi-Ca(Gd)-Cu-O]
| Critical Temperature (K) |
| 25 |
Measurement Method: SQUID magnetometer
"Magnetic susceptibility (DC) was measured on bar-shaped samples using a Quantum Design SQUID magnetometer. A magnetic field of (1 mT) was used to measure both shielding and Meissner effects."
Cautions: Evaluated Data
Resistivity (normal state) for Bi:232; [Bi-Ca(Gd)-Cu-O]
| Temperature (K) |
Resistivity (normal state) (mΩ·cm) |
| 8.3 |
36.0 |
| 13.0 |
41.5 |
| 24.0 |
46.0 |
| 53.3 |
38.0 |
| 94.0 |
32.6 |
| 148.2 |
30.0 |
| 214.0 |
28.2 |
| 265.6 |
28.0 |
| 299.4 |
27.4 |
Measurement Method: Four-probe method
"Resistivity was measured using the standard four-probe method." No additional measurement details were noted.
Cautions: Unevaluated Data
Digitized data were obtained from Figure 7 of the paper.
Hall Coefficient for Bi:232; [Bi-Ca(Gd)-Cu-O]
| Sintering Atmosphere () |
Temperature (K) |
Hall Coefficient (mm3 /C) |
| -- |
70 |
3.35 |
| -- |
91 |
3.52 |
| -- |
97 |
3.75 |
| -- |
126 |
3.65 |
| -- |
153 |
3.87 |
| -- |
200 |
3.54 |
| -- |
226 |
3.63 |
| -- |
252 |
3.35 |
| -- |
276 |
2.98 |
Measurement Method: Hall effect measurement
"For Hall effect measurements, very good electrical contact was achieved by applying silver paster to the samples, followed by post-annealing in flowing O
2 at about 600 °C for a few hours. The typical contact... resistance was found to be 2-3 Ω."
Cautions: Evaluated Data
Magnetic Susceptibility for Bi:232; [Bi-Ca(Gd)-Cu-O]
| Temperature (K) |
Magnetic Susceptibility (arbitrary) |
| 5.6 |
-0.1 |
| 8.3 |
-0.1 |
| 11.0 |
-0.1 |
| 14.0 |
-0.1 |
| 17.4 |
-0.0 |
| 21.0 |
0.0 |
| 23.0 |
0.1 |
| 26.5 |
0.1 |
| 29.2 |
0.1 |
| 47.4 |
0.1 |
| 68.3 |
0.0 |
Measurement Method: SQUID magnetometer
"Magnetic susceptibility (DC) was measured on bar-shaped samples using a Quantum Design SQUID magnetometer. A magnetic field of (1 mT) was used to measure both shielding and Meissner effects."
Cautions: Evaluated Data
Digitized data were obtained from Figure 6 of the paper.
