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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: Growth and Characterization of Bi2Sr2CaCu2O8+δ and Bi2Sr2CuO6+ γ Single Crystals
Author(s): M. Boekholt, M. Fleuster, F. Nouvertne, M. Hermann, G.Guntherodt, C.Jaekel, D.Anselmetti, H.J.Guntherodt et al.
Publication: Physica C Volume: 203 Issue: Not Available Year: 1992 Page(s): 180-192
Editor(s): Not Available
Publisher: Elsevier Science Publishers B.V.
Language: English
Notes: et al = D. Wehler and G. Muller
Keywords: Material Specification, Critical Temperature, Surface Resistance, Magnetic Susceptibility

Materials and Properties

Bi:2212; [Bi-Sr-Ca-Cu-O]
Material Specification for Bi:2212; [Bi-Sr-Ca-Cu-O] Process: Melt Processed
Notes: "... single crystals are grown from the melt using a stoichiometric starting composition for the cations. For this reason, powders of Bi2O3, SrCO3, CaCO3 and CuO are mixed in an appropriate proportion and heated up to 1100 °C. The resulting liquid is held at 1100 °C for several hours, before it is cooled quickly (about 50 K/h) down to 900 °C. The temperature range between 900 °C and 800 °C is passed with a low cooling rate (typically 1 K/h)... When the temperature of 800 °C is reached, the material is cooled down to room temperature with a cooling rate of 50 K/h."
Formula: Bi2Sr2CaCu2O8+x
Informal Name: Bi:2212
Chemical Family: Bi-Sr-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 Bi:2212; [Bi-Sr-Ca-Cu-O]
Critical Temperature (K)
92
Measurement Method: SQUID magnetometer
"The DC-susceptibility was measured using a SQUID-magnetometer (Quantum Design)." No additional measurement details were noted.

Cautions: Evaluated Data
"The Bi-2212 crystals obtained by the self-flux method...are all superconducting with transition temperatures between 78 K and 92 K. This variation in Tc is due to different oxygen contents....From an iodometric titration of only some...crystals (x of O8+x was) determined to be 0.1 ≤x ≤0.3."
Surface Resistance for Bi:2212; [Bi-Sr-Ca-Cu-O]
Magnetic Field Strength (A/m) Temperature (K) Surface Resistance (mΩ)
4 3 13
4 9 13
4 16 12
4 23 12
4 38 15
4 58 23
4 67 34
4 76 47
4 83 95
4 92 135
4 103 147
4 120 153
20 3 13
20 14 13
20 38 16
20 48 19
20 69 33
20 79 62
20 88 119
20 92 130
20 116 146
20 120 146
90 2 15
90 16 16
90 23 16
90 33 16
90 38 18
90 48 21
90 72 43
90 82 91
90 86 117
90 89 127
90 95 141
90 119 146
Measurement Method: Surface resistance
The authors cite G. Muller et al., Proc. 2nd EPAC, Nice, ISBN 2-86332-090-4 (1990) 1112, and summarize the procedure as follows. "... surface resistance Rc at 3 GHz was also measured as a function of temperature..." No additional measurement details were noted.

Cautions: Evaluated Data
Digitized data were obtained from Figure 16 of the paper.
Magnetic Susceptibility for Bi:2212; [Bi-Sr-Ca-Cu-O]
Magnetic Field Strength (A/m) Temperature (K) Magnetic Susceptibility (arbitrary)
0 6 -0.102
0 19 -0.102
0 35 -0.101
0 55 -0.099
0 68 -0.094
0 78 -0.079
0 84 -0.047
0 88 -0.016
0 90 0.000
0 100 0.000
159 5 -0.045
159 22 -0.044
159 38 -0.044
159 54 -0.044
159 71 -0.042
159 81 -0.036
159 88 -0.015
159 91 0.000
159 100 0.000
Measurement Method: SQUID magnetometer
"The DC-susceptibility was measured using a SQUID-magnetometer (Quantum Design)." No additional measurement details were noted.

Cautions: Evaluated Data
Digitized data were obtained from Figure 14 of the paper.