Material Specification for Bi:2212; [Bi-Sr-Ca-Cu-O]
Process: Solid State Reaction
Notes: The authors cite R. Job, et al., Proc. ICMC'90 Topical Conf. on High-Temperature Superconductors: Material Aspects, May 1990, Garmisch-Partenkirchen, Germany, and summarize the procedure as follows. "Ceramic Bi-HTSC of the 2223-type partially substituted with Pb for Bi were prepared by the conventional powder technique. Starting from the nominal composition Bi1.84Pb0.34Sr2.03Ca1.90Cu3.06Oy and a special procedure of heat treatments one can obtain almost single-phase polycrystalline samples. The annealing of the samples was carried out in two steps. Firstly the samples were annealed for one week in a pure oxygen atmosphere at 855 °C and afterwards a second annealing... was carried out in air under normal pressure at 855 °C... Bi-2212... has also been prepared... firstly annealing for one week in pure oxygen at 855 °C and secondly for ten days in air at 855 °C."
Formula: Bi2Sr2CaCu2Ox
Informal Name: Bi:2212
Chemical Family: Bi-Sr-Ca-Cu-O
Chemical Class: Oxide
Structure Type:
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) |
| 50 |
1.3 |
| 60 |
0.8 |
| 64 |
0.5 |
| 72 |
0.3 |
| 80 |
0.1 |
| 90 |
0.0 |
Measurement Method: Vibrating sample magnetometer
"The samples were prepared in a cylindric shape with a diameter of 4.4 mm (4.45) and a height of 2.9 mm (2.55 mm) in the 2223 (2212) case. Magnetic measurements were carried out with the applied field parallel to the plane of the cylinders... The magnetization of the studied samples was measured with a vibrating sample magnetometer... The critical field H
was determined from the magnetization curve, defining H
as the field at which the virgin magnetization curve starts to deviate from linearity... the uncertainty reaches about 5-10% in the estimation of H
... The irreversibility line was determined from zfc and fc susceptibility measurements at several applied magnetic fields. Cooling the sample in zero field down to 4 K and turning on the field after the stabilization of the temperature yields the zfc flux exclusion or shielding measurement. Cooling in an applied field through Tc down to 4 K yields the fc flux expulsion measurement (Meissner signal). At the temperature T* both temperature-dependent susceptibility curves (zfc, fc) converge and the corresponding value of the magnetic field yields a point on the irreversibility line."
Cautions: Evaluated Data
Digitized data were obtained from Figure 7 of the paper.
Critical Field Strength Hc1 for Bi:2212; [Bi-Sr-Ca-Cu-O]
| Phase () |
Temperature (K) |
Crit.Mag.Field Strength Hc1 (kA/m) |
| 2212 |
5 |
7.5 |
| 2212 |
8 |
6.6 |
| 2212 |
10 |
4.9 |
| 2212 |
13 |
4.4 |
| 2212 |
15 |
4.4 |
| 2212 |
17 |
4.1 |
| 2212 |
20 |
4.1 |
| 2212 |
25 |
3.2 |
| 2212 |
30 |
2.6 |
| 2212 |
35 |
2.6 |
| 2212 |
40 |
1.7 |
| 2212 |
46 |
1.4 |
| 2212 |
50 |
1.1 |
Measurement Method: Vibrating sample magnetometer
"The samples were prepared in a cylindric shape with a diameter of 4.4 mm (4.45) and a height of 2.9 mm (2.55 mm) in the 2223 (2212) case. Magnetic measurements were carried out with the applied field parallel to the plane of the cylinders... The magnetization of the studied samples was measured with a vibrating sample magnetometer... The critical field H
was determined from the magnetization curve, defining H
as the field at which the virgin magnetization curve starts to deviate from linearity... the uncertainty reaches about 5-10% in the estimation of H
... The irreversibility line was determined from zfc and fc susceptibility measurements at several applied magnetic fields. Cooling the sample in zero field down to 4 K and turning on the field after the stabilization of the temperature yields the zfc flux exclusion or shielding measurement. Cooling in an applied field through Tc down to 4 K yields the fc flux expulsion measurement (Meissner signal). At the temperature T* both temperature-dependent susceptibility curves (zfc, fc) converge and the corresponding value of the magnetic field yields a point on the irreversibility line."
Cautions: Evaluated Data
Digitized data were obtained from Figure 3 of the paper.
Material Specification for Bi:2223; [Bi(Pb)-Sr-Ca-Cu-O]
Process: Solid State Reaction
Notes: The authors cite R. Job, et al., Proc. ICMC'90 Topical Conf. on High-Temperature Superconductors: Material Aspects, May 1990, Garmisch-Partenkirchen, Germany, and summarize the procedure as follows. "Ceramic Bi-HTSC of the 2223-type partially substituted with Pb for Bi were prepared by the conventional powder technique. Starting from the nominal composition Bi1.84Pb0.34Sr2.03Ca1.90Cu3.06Oy and a special procedure of heat treatments one can obtain almost single-phase polycrystalline samples. The annealing of the samples was carried out in two steps. Firstly the samples were annealed for one week in a pure oxygen atmosphere at 855 °C and afterwards a second annealing... was carried out in air under normal pressure at 855 °C... Bi-2212... has also been prepared... firstly annealing for one week in pure oxygen at 855 °C and secondly for ten days in air at 855 °C."
Formula: Bi2-xPbxSr2Ca2Cu3Oy
Informal Name: Bi:2223
Chemical Family: Bi(Pb)-Sr-Ca-Cu-O
Chemical Class: Oxide
Structure Type:
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:
Critical Field Strength Hc1 for Bi:2223; [Bi(Pb)-Sr-Ca-Cu-O]
| Phase () |
Temperature (K) |
Crit.Mag.Field Strength Hc1 (kA/m) |
| 2223 |
4 |
22.8 |
| 2223 |
10 |
19.3 |
| 2223 |
15 |
15.1 |
| 2223 |
20 |
12.8 |
| 2223 |
25 |
10.8 |
| 2223 |
30 |
9.0 |
| 2223 |
35 |
8.2 |
| 2223 |
40 |
7.5 |
| 2223 |
45 |
6.7 |
| 2223 |
50 |
6.1 |
| 2223 |
55 |
4.6 |
| 2223 |
61 |
4.0 |
| 2223 |
66 |
3.4 |
| 2223 |
71 |
2.5 |
| 2223 |
76 |
1.9 |
| 2223 |
80 |
1.6 |
Measurement Method: Vibrating sample magnetometer
"The samples were prepared in a cylindric shape with a diameter of 4.4 mm (4.45) and a height of 2.9 mm (2.55 mm) in the 2223 (2212) case. Magnetic measurements were carried out with the applied field parallel to the plane of the cylinders... The magnetization of the studied samples was measured with a vibrating sample magnetometer... The critical field H
was determined from the magnetization curve, defining H
as the field at which the virgin magnetization curve starts to deviate from linearity... the uncertainty reaches about 5-10% in the estimation of H
... The irreversibility line was determined from zfc and fc susceptibility measurements at several applied magnetic fields. Cooling the sample in zero field down to 4 K and turning on the field after the stabilization of the temperature yields the zfc flux exclusion or shielding measurement. Cooling in an applied field through Tc down to 4 K yields the fc flux expulsion measurement (Meissner signal). At the temperature T* both temperature-dependent susceptibility curves (zfc, fc) converge and the corresponding value of the magnetic field yields a point on the irreversibility line."
Cautions: Evaluated Data
