Material Specification for Tl:2212; [Tl-Ba-Ca-Cu-O]
Process: Solid State Reaction
Notes: "This sample... was prepared by heating a mixture of Tl2O3:BaO2:CaO:CuO in the molar ratio of 1:2:2:3 at 850 °C for 15 h in an oxygen pressure of (20 MPa = 200 bar)."
Formula: Tl2Ba2CaCu2Ox
Informal Name: Tl:2212
Chemical Family: Tl-Ba-Ca-Cu-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:
Crystallography for Tl:2212; [Tl-Ba-Ca-Cu-O]
| Crystal System: | Orthorhombic |
| Formula Units per Cell: | |
| Space Group: |
A2aa
|
Cell Parameters
|
Temp
K
|
a
Å
|
b
Å
|
c
Å
|
| 296 |
3.85 |
-- |
29.30 |
Measurement Method: X-ray diffraction
"The X-ray diffraction analysis was carried out using a Siemens D-500 diffractometer with CuKα radiation filtered through an Ni filter. The detector slit widths and the 2θ step size were both 0.05°."
Cautions: Evaluated Data
Critical Current Density for Tl:2212; [Tl-Ba-Ca-Cu-O]
| Temperature (K) |
Magnetic Field (T) |
Critical Current Density (kA/cm2) |
| 5 |
0.1 |
17252 |
| 5 |
0.7 |
15150 |
| 5 |
1.5 |
10625 |
| 5 |
2.1 |
9351 |
| 5 |
2.2 |
8258 |
| 5 |
3.0 |
8120 |
| 5 |
3.5 |
7155 |
| 5 |
4.0 |
6312 |
| 5 |
4.5 |
5561 |
| 20 |
0.0 |
6311 |
| 20 |
0.1 |
5066 |
| 20 |
0.4 |
4572 |
| 20 |
0.6 |
3693 |
| 20 |
0.9 |
2990 |
| 20 |
1.3 |
2440 |
| 20 |
1.9 |
1582 |
| 40 |
0.0 |
1992 |
| 40 |
0.1 |
1130 |
| 40 |
0.4 |
408 |
| 40 |
0.6 |
131 |
| 40 |
1.0 |
67 |
| 40 |
1.3 |
31 |
| 40 |
1.7 |
18 |
| 40 |
1.9 |
11 |
| 60 |
0.0 |
708 |
| 60 |
0.1 |
316 |
| 60 |
0.1 |
126 |
| 60 |
0.1 |
63 |
| 60 |
0.2 |
22 |
| 80 |
0.0 |
35 |
| 80 |
0.0 |
5 |
| 80 |
0.1 |
0 |
| 80 |
0.2 |
0 |
Measurement Method: SQUID magnetometer
"The magnetic hysteresis measurements were done on the... SQUID magnetometer. An oriented sintered cylindrical piece of the sample with 2 mm diameter was used to carry out the hysteresis measurements. The cylindrical sample was mounted with its axis (and crystallographic c-axis) parallel to the field....The field was calibrated at low values using a tin sphere standard... The critical current was calculated from the magnetization data using Bean's model."
Cautions: Evaluated Data
Digitized data were obtained from Figure 6 of the paper.
Magnetic Susceptibility for Tl:2212; [Tl-Ba-Ca-Cu-O]
| Temperature (K) |
Magnetic Susceptibility (arbitrary) |
| 20.5 |
-0.003 |
| 51.0 |
-0.003 |
| 80.4 |
-0.003 |
| 92.0 |
-0.003 |
| 95.1 |
-0.003 |
| 96.3 |
-0.003 |
| 97.6 |
-0.002 |
| 98.0 |
-0.001 |
| 101.0 |
0.000 |
| 104.1 |
0.000 |
| 110.0 |
0.000 |
| 130.1 |
0.000 |
Measurement Method: SQUID magnetometer
"The magnetic hysteresis measurements were done on the... SQUID magnetometer. An oriented sintered cylindrical piece of the sample with 2 mm diameter was used to carry out the hysteresis measurements. The cylindrical sample was mounted with its axis (and crystallographic c-axis) parallel to the field....The field was calibrated at low values using a tin sphere standard... The critical current was calculated from the magnetization data using Bean's model."
Cautions: Evaluated Data
Digitized data were obtained from Figure 3 of the paper.
