NIST High Temp. Superconducting Materials (HTS) Database:

NIST Standard Reference Database 62

Last Update to Data Content: 1996

DOI: https://doi.org/10.18434/T4KP8J


Bibliographic Information

Title: Crystal Growth and Resistive Upper Critical Fields in Tl2Ba2CuOx and Tl2Ba2CaCu2Oy
Author(s): M. Hasegawa, Y. Matsushita, Y. Iye, F. Sakai, and H. Takei
Publication: Physica C Volume: 235 Issue: Not Available Year: 1994 Page(s): 3173-3174
Editor(s): Not Available
Publisher: Elsevier Science Publishers B.V.
Language: English
Notes: Vol. 235-240, multiple volume issue
Keywords: Material Specification, Critical Flux Density Hc2, Resistivity (normal state)

Materials and Properties

Tl:221; [Tl-Ba-Cu-O]
Tl:2212; [Tl-Ba-Ca-Cu-O]
Material Specification for Tl:221; [Tl-Ba-Cu-O] Process: Melt Processed
Notes: "This paper reports the crystal growth... in a liquid coexisting with solid. ... Nominal cations ratio of Tl:Ba:Ca:Cu in starting mixtures were 2:2:0:2 for Tl-2201 and 1.5:2:3:1.5 for Tl-2212. Each mixture of raw materials of Tl2O3(3N), BaO2(4N), CuO(4N) and CaO(3N) was sealed tightly in a gold capsule. It was heated in a vertical electric furnace in a flow of oxygen gas. After soaking at each prescribed temperature for several hours, it was cooled down to another prescribed temperature at a rate of 2 °C/h and then rapidly to the room temperature in the furnace. The conditions were in the coexisting region of liquid and solid. ... Platelet thick crystals of Tl-2201 are obtained in the typical size of about 0.8 mm x 0.8 mm x 50 µm. The maximum size is about 1.5 mm x 1.5 mm x 100 µm. Polyhedral thick crystals of Tl-2212 are obtained... The typical size is about 1 mm x 1 mm x 100 µm and the maximum size about 2 mm x 2 mm x 500 µm."
Formula: Tl1.7Ba2CuOx
Informal Name: Tl:221
Chemical Family: Tl-Ba-Cu-O
Chemical Class: Oxide
Structure Type: Single Crystal
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:

Critical Flux Density Hc2 for Tl:221; [Tl-Ba-Cu-O]
Angle(c,H) (degrees) Temperature (K) Crit.Mag.Flux Density Hc2 (T)
0 1.4 9.0
0 4.3 5.9
0 7.9 3.9
0 9.7 2.9
0 13.1 2.0
0 17.4 0.9
0 21.6 0.5
0 29.2 0.06
90 25.6 8.9
90 27.2 2.9
90 28.2 0.9
90 29.2 0.06
Measurement Method: Four-probe method
The authors cite Y. Iye et al., Physica C, Vol. 153-155, 26 (1988), and summarize the procedure as follows. "Temperature dependence of resistivity of several crystals was measured by a conventional dc four probe method between 1.5 K and 300 K in applied magnetic fields up to 9 T. The direction of the excitation current of 1 mA was in the ab-phane."

Cautions: Evaluated Data
Angle(c,H) is the angle between the c-axis and the direction of the applied magnetic field.
Resistivity (normal state) for Tl:221; [Tl-Ba-Cu-O]
Angle(c,H) (degrees) Temperature (K) Magnetic Field (T) Resistivity (normal state) (mΩ·cm)
0 25.0 0.0 0.031
0 25.0 1.0 0.030
0 25.0 2.0 0.031
0 25.0 3.0 0.031
0 25.0 4.0 0.031
0 25.0 5.9 0.031
0 25.0 7.0 0.032
0 25.0 7.9 0.032
0 25.0 9.0 0.032
0 22.7 0.0 0.026
0 22.7 0.2 0.029
0 22.7 1.0 0.029
0 22.7 2.0 0.029
0 22.7 3.0 0.030
0 22.7 4.0 0.030
0 22.7 5.0 0.030
0 22.7 5.9 0.030
0 22.7 7.0 0.030
0 22.7 7.9 0.030
0 22.7 9.0 0.031
0 16.8 0.0 0
0 16.8 0.3 0
0 16.8 0.5 0.009
0 16.8 0.7 0.016
0 16.8 0.8 0.023
0 16.8 1.0 0.025
0 16.8 1.9 0.026
0 16.8 3.0 0.026
0 16.8 3.9 0.027
0 16.8 5.0 0.027
0 16.8 5.9 0.027
0 16.8 7.0 0.027
0 16.8 7.9 0.028
0 16.8 9.0 0.028
0 9.70 0.0 0.000
0 9.70 1.0 0.000
0 9.70 1.3 0.000
0 9.70 1.6 0.007
0 9.70 2.0 0.018
0 9.70 2.5 0.022
0 9.70 3.1 0.023
0 9.70 4.0 0.024
0 9.70 5.0 0.024
0 9.70 5.9 0.025
0 9.70 7.0 0.025
0 9.70 7.9 0.025
0 9.70 9.0 0.025
0 1.56 0.0 0.000
0 1.56 1.0 0.000
0 1.56 2.0 0.000
0 1.56 3.0 0.000
0 1.56 3.7 0.000
0 1.56 4.0 0.001
0 1.56 4.6 0.010
0 1.56 5.0 0.016
0 1.56 6.0 0.021
0 1.56 7.0 0.022
0 1.56 7.9 0.023
0 1.56 9.0 0.023
Measurement Method: Four-probe method
The authors cite Y. Iye et al., Physica C, Vol. 153-155, 26 (1988), and summarize the procedure as follows. "Temperature dependence of resistivity of several crystals was measured by a conventional dc four probe method between 1.5 K and 300 K in applied magnetic fields up to 9 T. The direction of the excitation current of 1 mA was in the ab-phane."

Cautions: Evaluated Data
Angle(c,H) is the angle between the c-axis and the direction of the applied magnetic field.
Material Specification for Tl:2212; [Tl-Ba-Ca-Cu-O] Process: Melt Processed
Notes: "This paper reports the crystal growth... in a liquid coexisting with solid. ... Nominal cations ratio of Tl:Ba:Ca:Cu in starting mixtures were 2:2:0:2 for Tl-2201 and 1.5:2:3:1.5 for Tl-2212. Each mixture of raw materials of Tl2O3(3N), BaO2(4N), CuO(4N) and CaO(3N) was sealed tightly in a gold capsule. It was heated in a vertical electric furnace in a flow of oxygen gas. After soaking at each prescribed temperature for several hours, it was cooled down to another prescribed temperature at a rate of 2 °C/h and then rapidly to the room temperature in the furnace. The conditions were in the coexisting region of liquid and solid. ... Platelet thick crystals of Tl-2201 are obtained in the typical size of about 0.8 mm x 0.8 mm x 50 µm. The maximum size is about 1.5 mm x 1.5 mm x 100 µm. Polyhedral thick crystals of Tl-2212 are obtained... The typical size is about 1 mm x 1 mm x 100 µm and the maximum size about 2 mm x 2 mm x 500 µm."
Formula: Tl1.8Ba2Ca0.85Cu2.2Ox
Informal Name: Tl:2212
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 Flux Density Hc2 for Tl:2212; [Tl-Ba-Ca-Cu-O]
Angle(c,H) (degrees) Temperature (K) Crit.Mag.Flux Density Hc2 (T)
0 66.4 9.0
0 73.5 5.9
0 81.2 4.0
0 84.7 2.8
0 90.6 1.9
0 95.7 1.0
0 98.3 0.4
0 101 0.1
0 105 0
90 98.9 8.9
90 101 5.9
90 101 3.9
90 102 2.9
90 103 1.9
90 104 0.9
90 105 0.4
90 105 0.1
90 105 0
Measurement Method: Four-probe method
The authors cite Y. Iye et al., Physica C, Vol. 153-155, 26 (1988), and summarize the procedure as follows. "Temperature dependence of resistivity of several crystals was measured by a conventional dc four probe method between 1.5 K and 300 K in applied magnetic fields up to 9 T. The direction of the excitation current of 1 mA was in the ab-phane."

Cautions: Evaluated Data
Angle(c,H) is the angle between the c-axis and the direction of the applied magnetic field.