Material Specification for Bi:2212; [Bi-Sr-Ca-Cu-O]
Process: Melt Processed
Notes: "The experiments were performed on a high-quality single crystal... prepared from the melt in a temperature gradient."
Formula: Bi2Sr2CaCu2O8
Informal Name: Bi:2212
Chemical Family: Bi-Sr-Ca-Cu-O
Chemical Class: Oxide
Structure Type: Single Crystal
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) |
| 17 |
5.0 |
| 23 |
1.0 |
| 41 |
0.1 |
| 69 |
0.01 |
| 84 |
0.001 |
Measurement Method: Irreversibility method
The authors cite A. Schilling et al., Phys. Rev. B, Vol. 46, 14253 (1992), and summarize the procedure as follows. "The irreversibility boundary T
irr(B) was measured using a quasistatic technique... The method is based on the measurement of the reduction of trapped magnetic flux with increasing temperature by a SQUID probe. The remanent magnetization, i.e., the critical-current density j
c, vanishes at T
irr(B)... signals for H parallel to the c axis of the crystal (were measured). The monitored voltage changes V
c at the analog output of the SQUID system correspond to magnetization variations ΔM/ΔV
c... The remanent magnetization does not vanish abruptly in our experiments... Therefore, we chose to use the minimum in V
c(T) as a criterion defining T
irr(B)..."
Cautions: Evaluated Data
Digitized data were obtained from Figure 2 of the papre.
