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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: Normal State and Superconducting Properties of Bi2Sr2Ca1-xHoxCu2Oy Compounds
Author(s): S.L. Raghavan, C. Schlenker, and G.V. Subba Rao
Publication: Solid State Communications Volume: 82 Issue: 11 Year: 1992 Page(s): 885-888
Editor(s): Not Available
Publisher: Pergamon Press Ltd
Language: English
Notes: Not Available
Keywords: Material Specification, Critical Temperature, Resistivity (normal state), Thermoelectric Power

Materials and Properties

Bi:2212; [Bi-Sr-Ca(Ho)-Cu-O]
Material Specification for Bi:2212; [Bi-Sr-Ca(Ho)-Cu-O] Process: Solid State Reaction
Notes: "... compounds were prepared by the solid state reaction technique. Stoichiometric amounts of Bi2O3, SrCO3, CaCO3, Ho2O3 and CuO were thoroughly mixed and calcined at 830 °C for 12 h. The x=0 compound was prepared by heating the calcined material at 860 °C for 12 h followed by heating at 870 °C for 12 h with intermittent grindings. Then they were made into 8 mm pellets and sintered at 870 °C for 12 h. For the Ho-doped samples, higher temperatures of 900-910 °C had to be used to achieve single phase materials."
Formula: Bi2Sr2Ca1-xHoxCu2Oy
Informal Name: Bi:2212
Chemical Family: Bi-Sr-Ca(Ho)-Cu-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:

Critical Temperature for Bi:2212; [Bi-Sr-Ca(Ho)-Cu-O]
x of Hox (formula units) Critical Temperature (K)
0.0 74
0.1 76
0.2 80
0.3 65
0.4 50
0.5 25
0.6 0
Measurement Method: Van der Pauw method
"Electrical resistivity measurements were carried out by the Van der Pauw method using a CTI cryogenics (Model 21C) closed cycle refrigerator from room temperature down to 15 K." No additional measurement details were noted.

Cautions: Evaluated Data
Digitized data were obtained from Figure 3 of the paper.
Resistivity (normal state) for Bi:2212; [Bi-Sr-Ca(Ho)-Cu-O]
x of Hox (formula units) Temperature (K) Resistivity (normal state) (mΩ·cm)
0.0 77 0.0
0.0 85 0.4
0.0 99 0.5
0.0 141 0.7
0.0 201 0.9
0.0 262 1.2
0.0 300 1.3
0.1 77 0.0
0.1 85 0.4
0.1 99 0.6
0.1 141 0.8
0.1 201 1.0
0.1 262 1.2
0.1 300 1.3
0.2 83 0.1
0.2 85 0.4
0.2 91 0.8
0.2 95 1.2
0.2 99 1.4
0.2 141 1.7
0.2 221 1.9
0.2 296 2.2
0.2 298 2.2
0.4 58 0.1
0.4 82 1.2
0.4 100 2.1
0.4 161 2.5
0.4 241 2.9
0.4 296 3.1
0.5 32 2.0
0.5 62 3.4
0.5 80 3.6
0.5 102 3.4
0.5 121 3.5
0.5 201 4.5
0.5 281 5.7
0.5 300 5.9
Measurement Method: Van der Pauw method
"Electrical resistivity measurements were carried out by the Van der Pauw method using a CTI cryogenics (Model 21C) closed cycle refrigerator from room temperature down to 15 K." No additional measurement details were noted.

Cautions: Evaluated Data
Digitized data were obtained from Figure 2 of the paper.
Thermoelectric Power for Bi:2212; [Bi-Sr-Ca(Ho)-Cu-O]
x of Hox (formula units) Temperature (K) Thermoelectric Power (µV/K)
0.3 64 0.0
0.3 70 3.2
0.3 82 13.2
0.3 107 16.5
0.3 176 14.0
0.3 228 10.8
0.3 248 9.7
0.2 78 0.0
0.2 83 6.3
0.2 103 8.8
0.2 166 6.9
0.2 223 4.4
0.2 257 3.4
0.0 70 0.1
0.0 82 1.8
0.0 122 1.8
0.0 159 0.2
0.0 205 -1.2
Measurement Method: Thermopower method
The authors cite V. Vasudeva Rao, et al., J. Phys. F, Vol. 14, 973 (1984).

Cautions: Evaluated Data
Digitized data were obtained from Figure 6 of the paper.