Material Specification for Y:123; [Y-Ba-Cu-O]
Process: Solid State Reaction
Notes: The authors cite Y. Xu et al., Phys. Rev. B, Vol. 39, 6667 (1989), Y. Xu et al., Physica C, Vol. 169, 205 (1990), R.H. Arendt et al., J. Mater. Res., Vol. 5(1), 33-38 (1990), and Y. Gao, et al., Physica C, Vol. 165, 340 (1990), and summarize the procedure as follows. "... bulk sintered specimens of the desired compositions were prepared."
Formula: YBa2Cu3O7
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:
Irreversibility Field for Y:123; [Y-Ba-Cu-O]
| Temperature (K) |
Irreversibility Field (T) |
| 71 |
5.0 |
| 73 |
4.5 |
| 74 |
4.0 |
| 75 |
3.5 |
| 76 |
3.0 |
| 79 |
2.5 |
| 80 |
2.0 |
| 82 |
1.5 |
| 84 |
1.0 |
| 86 |
0.5 |
| 91 |
0.0 |
Measurement Method: SQUID magnetometer
"A commercial SQUID magnetometer (Quantum Design, Inc.) was used for the measurements of magnetic properties... For alignment of the c axis of the powders along the field direction, the specimens were crushed to an average powder size of (about) 10 µm and encapsulated in epoxy under a magnetic field of (8 T = 80 kG). Each capsule contained approximately 100 mg of the powder... Initially, the specimen was cooled to (about) 5 K in zero field... Then a chosen magnetic-field value was set in several incremental steps. The sample was then slowly warmed to a temperature well above T
c(H) and then slowly field cooled. During a warm-up and cool-down cycle, the temperature was varied by 0.5-K steps for (about) 15-K spans below T
c(H) and about T
(H). Between these regions the temperature was changed by 1 or 2 K per step... In order to minimize the effects of an inhomogeneous magnetic field... a 2- or 3-cm scan length was employed, depending on the value of applied field."
Cautions: Evaluated Data
Material Specification for Bi:2212; [Bi-Sr-Ca-Cu-O]
Process: Solid State Reaction
Notes: The authors cite Y. Xu et al., Phys. Rev. B, Vol. 39, 6667 (1989), Y. Xu et al., Physica C, Vol. 169, 205 (1990), R.H. Arendt et al., J. Mater. Res., Vol. 5(1), 33-38 (1990), and Y. Gao, et al., Physica C, Vol. 165, 340 (1990), and summarize the procedure as follows. "... bulk sintered specimens of the desired compositions were prepared."
Formula: Bi2Sr2CaCu2O8
Informal Name: Bi:2212
Chemical Family: Bi-Sr-Ca-Cu-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:
Irreversibility Field for Bi:2212; [Bi-Sr-Ca-Cu-O]
| Temperature (K) |
Irreversibility Field (T) |
| 16 |
5.0 |
| 18 |
4.0 |
| 18 |
3.0 |
| 22 |
2.0 |
| 26 |
1.0 |
| 29 |
0.7 |
| 36 |
0.4 |
| 43 |
0.1 |
| 52 |
0.05 |
| 55 |
0.03 |
| 65 |
0.00 |
Measurement Method: SQUID magnetometer
"A commercial SQUID magnetometer (Quantum Design, Inc.) was used for the measurements of magnetic properties... For alignment of the c axis of the powders along the field direction, the specimens were crushed to an average powder size of (about) 10 µm and encapsulated in epoxy under a magnetic field of (8 T = 80 kG). Each capsule contained approximately 100 mg of the powder... Initially, the specimen was cooled to (about) 5 K in zero field... Then a chosen magnetic-field value was set in several incremental steps. The sample was then slowly warmed to a temperature well above T
c(H) and then slowly field cooled. During a warm-up and cool-down cycle, the temperature was varied by 0.5-K steps for (about) 15-K spans below T
c(H) and about T
(H). Between these regions the temperature was changed by 1 or 2 K per step... In order to minimize the effects of an inhomogeneous magnetic field... a 2- or 3-cm scan length was employed, depending on the value of applied field."
Cautions: Evaluated Data
Material Specification for Bi:2223; [Bi(Pb)-Sr-Ca-Cu-O]
Process: Solid State Reaction
Notes: The authors cite Y. Xu et al., Phys. Rev. B, Vol. 39, 6667 (1989), Y. Xu et al., Physica C, Vol. 169, 205 (1990), R.H. Arendt et al., J. Mater. Res., Vol. 5(1), 33-38 (1990), and Y. Gao, et al., Physica C, Vol. 165, 340 (1990), and summarize the procedure as follows. "... bulk sintered specimens of the desired compositions were prepared."
Formula: Bi2-xPbxSr2Ca2Cu3O10
Informal Name: Bi:2223
Chemical Family: Bi(Pb)-Sr-Ca-Cu-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:
Irreversibility Field for Bi:2223; [Bi(Pb)-Sr-Ca-Cu-O]
| Temperature (K) |
Irreversibility Field (T) |
| 26 |
5.0 |
| 27 |
4.0 |
| 29 |
3.0 |
| 32 |
2.0 |
| 41 |
1.0 |
| 48 |
0.5 |
| 61 |
0.2 |
| 71 |
0.1 |
| 91 |
0.0 |
Measurement Method: SQUID magnetometer
"A commercial SQUID magnetometer (Quantum Design, Inc.) was used for the measurements of magnetic properties... For alignment of the c axis of the powders along the field direction, the specimens were crushed to an average powder size of (about) 10 µm and encapsulated in epoxy under a magnetic field of (8 T = 80 kG). Each capsule contained approximately 100 mg of the powder... Initially, the specimen was cooled to (about) 5 K in zero field... Then a chosen magnetic-field value was set in several incremental steps. The sample was then slowly warmed to a temperature well above T
c(H) and then slowly field cooled. During a warm-up and cool-down cycle, the temperature was varied by 0.5-K steps for (about) 15-K spans below T
c(H) and about T
(H). Between these regions the temperature was changed by 1 or 2 K per step... In order to minimize the effects of an inhomogeneous magnetic field... a 2- or 3-cm scan length was employed, depending on the value of applied field."
Cautions: Evaluated Data
Digitized data were obtained from Figures 5 and 8 of the paper.
