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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: Upper Critical Field and Anisotropy of the High-Tc Bi2Sr2Ca2Cu3Ox Phase
Author(s): I. Matsubara, H. Tanigawa, T. Ogura, H. Yamashita, M. Kinoshita, and T.Kawai
Publication: Physical Review B Volume: 45 Issue: 13 Year: 1992 Page(s): 7414-7417
Editor(s): Not Available
Publisher: American Physical Society
Language: English
Notes: Not Available
Keywords: Material Specification, Critical Temperature, Critical Flux Density Hc2, Coherence Length

Materials and Properties

Bi:2223; [Bi-Sr-Ca-Cu-O]
Material Specification for Bi:2223; [Bi-Sr-Ca-Cu-O] Process: Solid State Reaction
Notes: The authors cite H. Matsubara et al., Jpn. J. Appl. Phys. Vol. 28, L1121 (1989), and summarize the procedures as follows. "... whiskers were prepared by heating glassy plates in a steam of O2 gas... whiskers were placed in a powder with the composition of Bi2Sr2Ca4Cu6Pb0.5Ox, which had been calcined at 820 °C for 20 h. The sample containing the whiskers was annealed at 840°C for 120-180 h in air. After cooling to room temperature, the whiskers were removed mechanically."
Formula: Bi2Sr2Ca2Cu3Ox
Informal Name: Bi:2223
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:

Critical Temperature for Bi:2223; [Bi-Sr-Ca-Cu-O]
Critical Temperature (K)
106.5
Measurement Method: Four-probe method
"The magnetoresistance was measured by a standard four-probe method using a dc current of 0.05-0.5 mA along the ab plane. The electrical contact was made by using gold wires of 25 µm in diameter with silver epoxy. A magnetic field up to 7.5 T was applied parallel and perpendicular to the c axis with a superconducting solenoid. The current was always perpendicular to the magnetic field... H (was) defined at the conventional 50% value of the extrapolated normal-state resistivity in the magnetoresistance curves."

Cautions: Evaluated Data
Critical Flux Density Hc2 for Bi:2223; [Bi-Sr-Ca-Cu-O]
Field Direction () Temperature (K) Crit.Mag.Flux Density Hc2 (T)
H//c 95 7.5
H//c 98 5.9
H//c 101 4.4
H//c 103 3.0
H//c 107 1.4
H//c 109 0.4
H//c 109 0
H//ab 109.0 7.6
H//ab 109.0 6.1
H//ab 109.2 4.5
H//ab 109.2 3.0
H//ab 109.3 1.5
Measurement Method: Four-probe method
"The magnetoresistance was measured by a standard four-probe method using a dc current of 0.05-0.5 mA along the ab plane. The electrical contact was made by using gold wires of 25 µm in diameter with silver epoxy. A magnetic field up to 7.5 T was applied parallel and perpendicular to the c axis with a superconducting solenoid. The current was always perpendicular to the magnetic field... H (was) defined at the conventional 50% value of the extrapolated normal-state resistivity in the magnetoresistance curves."

Cautions: Evaluated Data
Digitized data were obtained from Figure 4 of the paper.
Coherence Length for Bi:2223; [Bi-Sr-Ca-Cu-O]
Direction () Coherence Length (σ)
ab plane 29
c axis 0.93
Measurement Method: Calculation
"The H (0) values are used to calculate the coherence length... from the Ginzburg-Landau relation..."

Cautions: Evaluated Data
"It should be noted that the coherence lengths would be overestimated because the H values are estimated from the field-broadened transition curves, which involve thermally activated resistivity."