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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: Neutron Structural Studies of Superconducting Bi2Sr2CuO6 and Bi2-xPbxSr1.8La0.2CuO6+δ (x = 0.0 and 0.2)
Author(s): H. Rajagopal, A. Sequeira, J.V. Yakhmi, P.V.P.S.S. Sastry, and R.M. Iyer
Publication: Japanese Journal of Applied Physics Volume: 32 Issue: 4 Year: 1993 Page(s): 1595-1600
Editor(s): Not Available
Publisher: Physical Soc. of Japan and the Jpn. Soc. of Applied Physics
Language: English
Notes: Not Available
Keywords: Material Specification, Crystallography, Critical Temperature

Materials and Properties

Bi:221; [Bi-Sr-Cu-O]
Bi:221; [bi-sr(la)-cu-o]
Bi:221; [bi(pb)-sr(la)-cu-o]
Material Specification for Bi:221; [Bi-Sr-Cu-O] Process: Solid State Reaction
Notes: The authors cite P.V.P.S.S. Sastry et al., Physica C, Vol. 178, 110 (1991), and summarize the procedure as follows. "The samples used in the present investigation were synthesized by a two-step precursor-matrix reaction route..."
Formula: Bi2Sr2CuO6+x
Informal Name: Bi:221
Chemical Family: Bi-Sr-Cu-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:

Crystallography for Bi:221; [Bi-Sr-Cu-O]
Crystal System: Orthorhombic
Formula Units per Cell:
Space Group: A2aa
Cell Parameters
Occupancy () Temp K a Å b Å c Å
-- 296 5.375(4) 5.378(4) 24.377(12)
Atomic Coordinates
Occupancy () Atom Temp K a-axis b-axis c-axis
0.93(2) Bi 296 0.019(7) 0.219(3) 0.0657(4)
0.78(2) Sr 296 0.482(7) 0.278(3) 0.1776(5)
0.83(3) Cu 296 0.5 0.75 0.25
1.0 O(1) 296 0.683(5) 0.479(3) 0.2364(5)
0.82(4) O(2) 296 -0.055(6) 0.275(3) 0.1519(5)
0.68(3) O(3A) 296 0.43(2) 0.314(6) 0.093(2)
0.49(3) O(3B) 296 0.45(1) 0.457(7) 0.049(1)
Measurement Method: Neutron diffraction
"Neutron diffraction patterns were recorded at room temperature at the 100 MW Dhruva reactor at Trombay. The samples were in the form of cylinderical pellets (about 6 g, 12 mm diameter and 12 mm height) and the neutron wavelength was 1.216 σ. The patterns were analyzed by the Rietveld provile refinement method using a modified version of the program DBW 3.2."

Cautions: Evaluated Data
Critical Temperature for Bi:221; [Bi-Sr-Cu-O]
Critical Temperature (K)
9.5
Measurement Method: Four-probe method
"The electrical resistivity of the samples was measured...by a standard DC four-probe technique, using a Datron Autocal Model 1071 DMM with a resolution of 0.1 µV." Tc was evaluated as the temperature at which the resistivity becomes zero.

Cautions: Evaluated Data
Material Specification for Bi:221; [Bi-Sr(La)-Cu-O] Process: Solid State Reaction
Notes: The authors cite P.V.P.S.S. Sastry et al., Physica C, Vol. 178, 110 (1991), and summarize the procedure as follows. "The samples used in the present investigation were synthesized by a two-step precursor-matrix reaction route..."
Formula: Bi2Sr1.8La0.2CuO6+x
Informal Name: Bi:221
Chemical Family: Bi-Sr(La)-Cu-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:

Crystallography for Bi:221; [Bi-Sr(La)-Cu-O]
Crystal System: Orthorhombic
Formula Units per Cell:
Space Group: Pnan
Cell Parameters
Occupancy () Temp K a Å b Å c Å
-- 296 5.396(4) 5.374(4) 24.374(12)
Atomic Coordinates
Occupancy () Atom Temp K a-axis b-axis c-axis
1.02(2) Bi 296 -0.002(3) 0.739(3) 0.0642(4)
1.03(3) Sr 296 0.454(3) 0.723(4) 0.1748(4)
0.96(4) Cu 296 0.5 0.25 0.25
1.0 O(1) 296 0.691(5) -0.027(4) 0.2439(9)
0.99(4) O(2) 296 -0.080(3) 0.750(4) 0.1532(5)
0.76(3) O(3A) 296 0.442(4) 0.861(3) 0.0635(7)
0.43(3) O(3B) 296 0.23(1) 1.01(1) 0.079(1)
Measurement Method: Neutron diffraction
"Neutron diffraction patterns were recorded at room temperature at the 100 MW Dhruva reactor at Trombay. The samples were in the form of cylinderical pellets (about 6 g, 12 mm diameter and 12 mm height) and the neutron wavelength was 1.216 σ. The patterns were analyzed by the Rietveld provile refinement method using a modified version of the program DBW 3.2."

Cautions: Evaluated Data
Critical Temperature for Bi:221; [Bi-Sr(La)-Cu-O]
Critical Temperature (K)
16.5
Measurement Method: Four-probe method
"The electrical resistivity of the samples was measured...by a standard DC four-probe technique, using a Datron Autocal Model 1071 DMM with a resolution of 0.1 µV." Tc was evaluated as the temperature at which the resistivity becomes zero.

Cautions: Evaluated Data
Material Specification for Bi:221; [Bi(Pb)-Sr(La)-Cu-O] Process: Solid State Reaction
Notes: The authors cite P.V.P.S.S. Sastry et al., Physica C, Vol. 178, 110 (1991), and summarize the procedure as follows. "The samples used in the present investigation were synthesized by a two-step precursor-matrix reaction route..."
Formula: Bi1.8Pb0.2Sr1.8La0.2CuO6+x
Informal Name: Bi:221
Chemical Family: Bi(Pb)-Sr(La)-Cu-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:

Crystallography for Bi:221; [Bi(Pb)-Sr(La)-Cu-O]
Crystal System: Orthorhombic
Formula Units per Cell:
Space Group: A2aa
Cell Parameters
Occupancy () Temp K a Å b Å c Å
-- 296 5.356(3) 5.361(4) 24.446(8)
Atomic Coordinates
Occupancy () Atom Temp K a-axis b-axis c-axis
0.95(2) Bi 296 -0.004(7) 0.238(3) 0.0660(3)
0.86(2) Sr 296 0.483(6) 0.268(3) 0.1767(3)
0.89(3) Cu 296 0.5 0.75 0.25
1.0 O(1) 296 0.694(6) 0.490(3) 0.239(5)
0.95(4) O(2) 296 -0.050(6) 0.255(3) 0.148(3)
0.74(3) O(3A) 296 0.45(2) 0.328(5) 0.0830(7)
0.37(3) O(3B) 296 0.45(1) 0.445(7) 0.045(1)
Measurement Method: Neutron diffraction
"Neutron diffraction patterns were recorded at room temperature at the 100 MW Dhruva reactor at Trombay. The samples were in the form of cylinderical pellets (about 6 g, 12 mm diameter and 12 mm height) and the neutron wavelength was 1.216 σ. The patterns were analyzed by the Rietveld provile refinement method using a modified version of the program DBW 3.2."

Cautions: Evaluated Data
Critical Temperature for Bi:221; [Bi(Pb)-Sr(La)-Cu-O]
Critical Temperature (K)
21
Measurement Method: Four-probe method
"The electrical resistivity of the samples was measured...by a standard DC four-probe technique, using a Datron Autocal Model 1071 DMM with a resolution of 0.1 µV." Tc was evaluated as the temperature at which the resistivity becomes zero.

Cautions: Evaluated Data