Material Specification for TlBa:1212; [Tl-Ba-Ca-Cu-O]
Process: Melt Processed
Notes: "Single crystal was synthesized by a melting mixture of Tl2O3, CaO, CuO and BaCuO2 in a Tamman tube and the typical sample size is about 0.5 x 0.5 x 0.1 mm3... From X-ray diffraction the composition of the sample is expected to be Tl:Ba:Ca:Cu=1:2:1:2."
Formula: TlBa2CaCu2Ox
Informal Name: TlBa:1212
Chemical Family: Tl-Ba-Ca-Cu-O
Chemical Class: Oxide
Structure Type: Single Crystal
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:
Critical Temperature for TlBa:1212; [Tl-Ba-Ca-Cu-O]
| Tc(midpoint) (K) |
Critical Temperature (K) |
| 106 |
100 |
Measurement Method: Four-probe method
"The electrical resistance was measured by a DC four-probe method. Electrical contacts were made by conductive silver paste and a measuring current of 0.3 mA was applied. The temperature of the sample was measured with a Pt resistance thermometer and temperature corrections for its magnetoresistance were made... The value of T
c defined by the zero resistance (is used)... H
is defined by the mid-point of the normal state resistance... The Ginzburg-Landau coherence lengths at 0 K... are also estimated by... ( Hc2(0) = Φ0/2¦L2 where Φ0 is the flux quantum and L is the coherence length )."
Cautions: Evaluated Data
Critical Flux Density Hc2 for TlBa:1212; [Tl-Ba-Ca-Cu-O]
| Field Direction () |
Temperature (K) |
Crit.Mag.Flux Density Hc2 (T) |
| //c-axis |
63 |
6.0 |
| //c-axis |
72 |
4.1 |
| //c-axis |
83 |
2.0 |
| //c-axis |
91 |
1.1 |
| //c-axis |
96 |
0.5 |
| //c-axis |
106 |
0 |
| //ab-plane |
87 |
21.0 |
| //ab-plane |
93 |
13.0 |
| //ab-plane |
95 |
9.0 |
| //ab-plane |
98 |
6.1 |
| //ab-plane |
102 |
2.0 |
| //ab-plane |
104 |
0.5 |
| //ab-plane |
106 |
0 |
Measurement Method: Four-probe method
"The electrical resistance was measured by a DC four-probe method. Electrical contacts were made by conductive silver paste and a measuring current of 0.3 mA was applied. The temperature of the sample was measured with a Pt resistance thermometer and temperature corrections for its magnetoresistance were made... The value of T
c defined by the zero resistance (is used)... H
is defined by the mid-point of the normal state resistance... The Ginzburg-Landau coherence lengths at 0 K... are also estimated by... ( Hc2(0) = Φ0/2¦L2 where Φ0 is the flux quantum and L is the coherence length )."
Cautions: Evaluated Data
Digitized data were obtained from Figure 3 of the paper.
Coherence Length for TlBa:1212; [Tl-Ba-Ca-Cu-O]
| Direction () |
Coherence Length (σ) |
| //c-axis |
5 |
| //ab-plane |
47 |
Measurement Method: Four-probe method
"The electrical resistance was measured by a DC four-probe method. Electrical contacts were made by conductive silver paste and a measuring current of 0.3 mA was applied. The temperature of the sample was measured with a Pt resistance thermometer and temperature corrections for its magnetoresistance were made... The value of T
c defined by the zero resistance (is used)... H
is defined by the mid-point of the normal state resistance... The Ginzburg-Landau coherence lengths at 0 K... are also estimated by... ( Hc2(0) = Φ0/2¦L2 where Φ0 is the flux quantum and L is the coherence length )."
Cautions: Evaluated Data
