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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: Pressure Dependence of the Superconducting Transition Temperature of Bi-and Tl-based High-Tc Superconductors
Author(s): R. Kubiak, K. Westerholt, G. Pelka, H. Bach, and Y. Khan
Publication: Physica C Volume: 166 Issue: Not Available Year: 1990 Page(s): 523-529
Editor(s): Not Available
Publisher: Elsevier Science Publishers B.V.
Language: English
Notes: Not Available
Keywords: Material Specification, Crystallography, Critical Temperature, Magnetic Susceptibility

Materials and Properties

Bi:2212; [Bi-Sr-Ca-Cu-O]
Bi:2223; [Bi(Pb)-Sr-Ca-Cu-O]
Tl:2223; [Tl-Ba-Ca-Cu-O]
Material Specification for Bi:2212; [Bi-Sr-Ca-Cu-O] Process: Solid State Reaction
Notes: "Polycrystalline compounds with the composition Bi2Sr2Ca1Cu2O8... and Bi1.6Pb0.4Sr2Ca2Cu3O10...were prepared by mixing the stoichiometric oxides and calcinating at 800 °C for 20 h. Then the compounds were reground, pressed into pellets and annealed for two days in air at 850 °C before quenching to room temperature. ... From the polycrystalline material single crystals of the Bi(2212)-phase were grown by Bridgman technique in Al2O3-crucibles. After melting of the compound at 1200°C the crucible was lowered in the thermal gradient of the induction furnace at a velocity of 1.5 mm/h. Single crystals with dimensions up to 6 x 4 x 2 mm3 could be separated from the ingot. Before the magnetic measurements the single crystals were annealed in air at 800°C for seven days... The Tl-based superconductor of the present study was prepared by mixing the oxides corresponding to the starting composition Tl1Ba1Ca3Cu3O8.5 and firing pellets (diameter 8 mm and thickness 2 mm) in porcellan boats at 870 °C for 1.5 min in air. The short time annealing process was repeated four times with thorough intermediate grinding of the powder. After the final step the sample was oven-cooled from 900 °C after 1.5 min to 370 °C in pure oxygen and kept at this temperature for 20 h before cooling to room temperature."
Formula: Bi2Sr2CaCu2O8
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:

Crystallography for Bi:2212; [Bi-Sr-Ca-Cu-O]
Crystal System: Orthorhombic
Formula Units per Cell:
Space Group:
Cell Parameters
Temp K a Å b Å c Å
296 5.40 5.41 30.94
Measurement Method: X-ray diffraction

Cautions: Unevaluated Data
No measurement details were noted.
Critical Temperature for Bi:2212; [Bi-Sr-Ca-Cu-O]
Sample () Pressure (GPa) Critical Temperature (K)
polycrystal 0.00 85.0
polycrystal 0.19 85.3
polycrystal 0.55 86.0
polycrystal 0.93 86.5
crystal 0.00 82.3
crystal 0.37 83.0
crystal 0.46 83.3
crystal 0.64 83.7
crystal 0.72 84.0
crystal 0.86 84.0
crystal 1.00 84.1
crystal 1.11 84.3
Measurement Method: SQUID magnetometer
"The pressure dependence of the superconducting transition temperature was determined from magnetization measurements by a noncommercial SQUID-magnetometer. The magnetometer uses a standard SHE RF-SQUID probe and electronics. The sample in the pressure clamp is placed at a fixed position in the center of one of two superconducting Helmholz-coils wound in series opposition. The pressure clamp is heated up at a constant heating rate of 0.5 K/min, the temperature is measured by a carbon-glass resistor in direct contact with the pressure anvil. The pressure was generated in a miniature Cu(Be)-clamp (outer diameter 7.5 mm)... The sample was placed inside a teflon capsule filled with a 1:1 mixture of isoamyl-alcohol and isopentan as a pressure transmitting medium. The value of the pressure inside the pressure cell was determined from the pressure shift of the superconducting transition temperature of a small Pb-sample contained in the cell together with the sample."

Cautions: Evaluated Data
Digitized data were obtained from Figure 2 of the paper.
Magnetic Susceptibility for Bi:2212; [Bi-Sr-Ca-Cu-O]
Sample () Field Direction () Pressure (GPa) Temperature (K) Magnetic Susceptibility (arbitrary)
crystal c-axis 0 67.3 -4.5
crystal c-axis 0 71.2 -4.1
crystal c-axis 0 74.9 -3.3
crystal c-axis 0 77.4 -2.5
crystal c-axis 0 79.9 -1.3
crystal c-axis 0 82.2 -0.2
crystal c-axis 0 83.8 0.0
crystal c-axis 0 88.0 0.0
crystal c-axis 1.11 67.3 -4.8
crystal c-axis 1.11 71.6 -4.4
crystal c-axis 1.11 76.7 -3.6
crystal c-axis 1.11 79.9 -2.4
crystal c-axis 1.11 82.2 -0.9
crystal c-axis 1.11 83.8 -0.2
crystal c-axis 1.11 85.2 0.0
crystal c-axis 1.11 87.9 0.0
crystal ab-plane 0 32.2 -5.5
crystal ab-plane 0 41.9 -4.2
crystal ab-plane 0 52.6 -2.8
crystal ab-plane 0 60.6 -1.8
crystal ab-plane 0 70.4 -0.9
crystal ab-plane 0 80.1 -0.1
crystal ab-plane 0 87.3 0.0
crystal ab-plane 1.11 32.5 -6.5
crystal ab-plane 1.11 41.0 -5.5
crystal ab-plane 1.11 50.4 -4.2
crystal ab-plane 1.11 59.7 -2.9
crystal ab-plane 1.11 68.7 -1.7
crystal ab-plane 1.11 77.6 -0.8
crystal ab-plane 1.11 82.7 -0.1
crystal ab-plane 1.11 86.9 0.0
polycrystal --- 0 66.8 -7.3
polycrystal --- 0 72.0 -6.6
polycrystal --- 0 78.3 -4.8
polycrystal --- 0 81.9 -2.6
polycrystal --- 0 85.3 0.0
polycrystal --- 0 89.4 0.0
polycrystal --- 1.11 67.5 -8.1
polycrystal --- 1.11 74.8 -7.2
polycrystal --- 1.11 79.5 -5.4
polycrystal --- 1.11 83.3 -2.6
polycrystal --- 1.11 85.8 -0.7
polycrystal --- 1.11 87.8 0.0
polycrystal --- 1.11 89.4 0.0
Measurement Method: SQUID magnetometer
"The pressure dependence of the superconducting transition temperature was determined from magnetization measurements by a noncommercial SQUID-magnetometer. The magnetometer uses a standard SHE RF-SQUID probe and electronics. The sample in the pressure clamp is placed at a fixed position in the center of one of two superconducting Helmholz-coils wound in series opposition. The pressure clamp is heated up at a constant heating rate of 0.5 K/min, the temperature is measured by a carbon-glass resistor in direct contact with the pressure anvil. The pressure was generated in a miniature Cu(Be)-clamp (outer diameter 7.5 mm)... The sample was placed inside a teflon capsule filled with a 1:1 mixture of isoamyl-alcohol and isopentan as a pressure transmitting medium. The value of the pressure inside the pressure cell was determined from the pressure shift of the superconducting transition temperature of a small Pb-sample contained in the cell together with the sample."

Cautions: Evaluated Data
Digitized data were obtained from Figure 1 of the paper.
Material Specification for Bi:2223; [Bi(Pb)-Sr-Ca-Cu-O] Process: Solid State Reaction
Notes: "Polycrystalline compounds with the composition Bi2Sr2Ca1Cu2O8... and Bi1.6Pb0.4Sr2Ca2Cu3O10...were prepared by mixing the stoichiometric oxides and calcinating at 800 °C for 20 h. Then the compounds were reground, pressed into pellets and annealed for two days in air at 850 °C before quenching to room temperature. ... From the polycrystalline material single crystals of the Bi(2212)-phase were grown by Bridgman technique in Al2O3-crucibles. After melting of the compound at 1200°C the crucible was lowered in the thermal gradient of the induction furnace at a velocity of 1.5 mm/h. Single crystals with dimensions up to 6 x 4 x 2 mm3 could be separated from the ingot. Before the magnetic measurements the single crystals were annealed in air at 800°C for seven days... The Tl-based superconductor of the present study was prepared by mixing the oxides corresponding to the starting composition Tl1Ba1Ca3Cu3O8.5 and firing pellets (diameter 8 mm and thickness 2 mm) in porcellan boats at 870 °C for 1.5 min in air. The short time annealing process was repeated four times with thorough intermediate grinding of the powder. After the final step the sample was oven-cooled from 900 °C after 1.5 min to 370 °C in pure oxygen and kept at this temperature for 20 h before cooling to room temperature."
Formula: Bi1.6Pb0.4Sr2Ca2Cu3O10
Informal Name: Bi:2223
Chemical Family: Bi(Pb)-Sr-Ca-Cu-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:

Crystallography for Bi:2223; [Bi(Pb)-Sr-Ca-Cu-O]
Crystal System: Tetragonal
Formula Units per Cell:
Space Group:
Cell Parameters
Temp K a Å b Å c Å
296 5.40 -- 37.03
Measurement Method: X-ray diffraction

Cautions: Unevaluated Data
No measurement details were noted.
Critical Temperature for Bi:2223; [Bi(Pb)-Sr-Ca-Cu-O]
Sample () Pressure (GPa) Critical Temperature (K)
-- 0.00 102.2
-- 0.06 102.0
-- 0.27 102.7
-- 0.47 103.3
-- 1.03 103.8
Measurement Method: SQUID magnetometer
"The pressure dependence of the superconducting transition temperature was determined from magnetization measurements by a noncommercial SQUID-magnetometer. The magnetometer uses a standard SHE RF-SQUID probe and electronics. The sample in the pressure clamp is placed at a fixed position in the center of one of two superconducting Helmholz-coils wound in series opposition. The pressure clamp is heated up at a constant heating rate of 0.5 K/min, the temperature is measured by a carbon-glass resistor in direct contact with the pressure anvil. The pressure was generated in a miniature Cu(Be)-clamp (outer diameter 7.5 mm)... The sample was placed inside a teflon capsule filled with a 1:1 mixture of isoamyl-alcohol and isopentan as a pressure transmitting medium. The value of the pressure inside the pressure cell was determined from the pressure shift of the superconducting transition temperature of a small Pb-sample contained in the cell together with the sample."

Cautions: Evaluated Data
Digitized data were obtained from Figure 2 of the paper.
Magnetic Susceptibility for Bi:2223; [Bi(Pb)-Sr-Ca-Cu-O]
Sample () Field Direction () Pressure (GPa) Temperature (K) Magnetic Susceptibility (arbitrary)
-- -- 0 81.3 -8.0
-- -- 0 87.3 -7.8
-- -- 0 92.4 -7.3
-- -- 0 97.5 -6.7
-- -- 0 100.3 -5.2
-- -- 0 101.4 -2.6
-- -- 0 102.7 0.0
-- -- 0 106.1 0.0
-- -- 1.02 81.7 -9.1
-- -- 1.02 87.9 -8.7
-- -- 1.02 94.7 -8.2
-- -- 1.02 99.6 -7.2
-- -- 1.02 102.0 -5.2
-- -- 1.02 102.9 -2.0
-- -- 1.02 104.2 0.0
Measurement Method: SQUID magnetometer
"The pressure dependence of the superconducting transition temperature was determined from magnetization measurements by a noncommercial SQUID-magnetometer. The magnetometer uses a standard SHE RF-SQUID probe and electronics. The sample in the pressure clamp is placed at a fixed position in the center of one of two superconducting Helmholz-coils wound in series opposition. The pressure clamp is heated up at a constant heating rate of 0.5 K/min, the temperature is measured by a carbon-glass resistor in direct contact with the pressure anvil. The pressure was generated in a miniature Cu(Be)-clamp (outer diameter 7.5 mm)... The sample was placed inside a teflon capsule filled with a 1:1 mixture of isoamyl-alcohol and isopentan as a pressure transmitting medium. The value of the pressure inside the pressure cell was determined from the pressure shift of the superconducting transition temperature of a small Pb-sample contained in the cell together with the sample."

Cautions: Evaluated Data
Digitized data were obtained from Figure 3 of the paper.
Material Specification for Tl:2223; [Tl-Ba-Ca-Cu-O] Process: Solid State Reaction
Notes: "Polycrystalline compounds with the composition Bi2Sr2Ca1Cu2O8... and Bi1.6Pb0.4Sr2Ca2Cu3O10...were prepared by mixing the stoichiometric oxides and calcinating at 800 °C for 20 h. Then the compounds were reground, pressed into pellets and annealed for two days in air at 850 °C before quenching to room temperature. ... From the polycrystalline material single crystals of the Bi(2212)-phase were grown by Bridgman technique in Al2O3-crucibles. After melting of the compound at 1200°C the crucible was lowered in the thermal gradient of the induction furnace at a velocity of 1.5 mm/h. Single crystals with dimensions up to 6 x 4 x 2 mm3 could be separated from the ingot. Before the magnetic measurements the single crystals were annealed in air at 800°C for seven days... The Tl-based superconductor of the present study was prepared by mixing the oxides corresponding to the starting composition Tl1Ba1Ca3Cu3O8.5 and firing pellets (diameter 8 mm and thickness 2 mm) in porcellan boats at 870 °C for 1.5 min in air. The short time annealing process was repeated four times with thorough intermediate grinding of the powder. After the final step the sample was oven-cooled from 900 °C after 1.5 min to 370 °C in pure oxygen and kept at this temperature for 20 h before cooling to room temperature."
Formula: Tl2Ba2Ca2Cu3O10
Informal Name: Tl:2223
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:2223; [Tl-Ba-Ca-Cu-O]
Crystal System: Tetragonal
Formula Units per Cell:
Space Group:
Cell Parameters
Temp K a Å b Å c Å
296 3.85 -- 35.53
Measurement Method: X-ray diffraction

Cautions: Unevaluated Data
No measurement details were noted.
Critical Temperature for Tl:2223; [Tl-Ba-Ca-Cu-O]
Sample () Pressure (GPa) Critical Temperature (K)
-- 0.00 99.6
-- 0.27 101.2
-- 0.46 101.5
-- 0.54 101.9
-- 0.69 102.9
Measurement Method: SQUID magnetometer
"The pressure dependence of the superconducting transition temperature was determined from magnetization measurements by a noncommercial SQUID-magnetometer. The magnetometer uses a standard SHE RF-SQUID probe and electronics. The sample in the pressure clamp is placed at a fixed position in the center of one of two superconducting Helmholz-coils wound in series opposition. The pressure clamp is heated up at a constant heating rate of 0.5 K/min, the temperature is measured by a carbon-glass resistor in direct contact with the pressure anvil. The pressure was generated in a miniature Cu(Be)-clamp (outer diameter 7.5 mm)... The sample was placed inside a teflon capsule filled with a 1:1 mixture of isoamyl-alcohol and isopentan as a pressure transmitting medium. The value of the pressure inside the pressure cell was determined from the pressure shift of the superconducting transition temperature of a small Pb-sample contained in the cell together with the sample."

Cautions: Evaluated Data
Digitized data were obtained from Figure 2 of the paper.
Magnetic Susceptibility for Tl:2223; [Tl-Ba-Ca-Cu-O]
Sample () Field Direction () Pressure (GPa) Temperature (K) Magnetic Susceptibility (arbitrary)
-- -- 0 71.8 -1.8
-- -- 0 82.6 -1.5
-- -- 0 90.9 -1.0
-- -- 0 95.2 -0.5
-- -- 0 98.5 -0.2
-- -- 0 105.3 0.0
-- -- 0 115.0 0.0
-- -- 0.68 74.3 -2.0
-- -- 0.68 84.0 -1.8
-- -- 0.68 91.5 -1.5
-- -- 0.68 96.2 -1.0
-- -- 0.68 99.9 -0.4
-- -- 0.68 104.6 -0.2
-- -- 0.68 115.0 0.0
Measurement Method: SQUID magnetometer
"The pressure dependence of the superconducting transition temperature was determined from magnetization measurements by a noncommercial SQUID-magnetometer. The magnetometer uses a standard SHE RF-SQUID probe and electronics. The sample in the pressure clamp is placed at a fixed position in the center of one of two superconducting Helmholz-coils wound in series opposition. The pressure clamp is heated up at a constant heating rate of 0.5 K/min, the temperature is measured by a carbon-glass resistor in direct contact with the pressure anvil. The pressure was generated in a miniature Cu(Be)-clamp (outer diameter 7.5 mm)... The sample was placed inside a teflon capsule filled with a 1:1 mixture of isoamyl-alcohol and isopentan as a pressure transmitting medium. The value of the pressure inside the pressure cell was determined from the pressure shift of the superconducting transition temperature of a small Pb-sample contained in the cell together with the sample."

Cautions: Evaluated Data
Digitized data were obtained from Figure 4 of the paper.