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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: Superconducting Critical Temperature and Electrical Resistivity of the System Y1-xPrxBa2Cu3O6.95 (0 ≤x ≤1)
Author(s): J.J. Neumeier and M.B. Maple
Publication: Physica C Volume: 191 Issue: Not Available Year: 1992 Page(s): 158-166
Editor(s): Not Available
Publisher: Elsevier Science Publishers B.V.
Language: English
Notes: Not Available
Keywords: Material Specification, Critical Temperature, Resistivity (normal state)

Materials and Properties

Y:123; [Y(Pr)-Ba-Cu-O]
Material Specification for Y:123; [Y(Pr)-Ba-Cu-O] Process: Solid State Reaction
Notes: "Specimens... were prepared by solid state reaction of the appropriate amounts of high purity (99.99% or better) Y2O3, Pr6O11BaCO3, and CuO. All of the oxides were dried overnight at 800 °C prior to use... The BaCO3 was dried overnight at 150 °C. The powders were weighed, ground with an agate mortar and pestle, and placed as a powder in an Al2O3 crucible. The powder was fired for 24 h in air at 930 °C. Four additional firings for 24 h intervals with intermediate regrindings were performed. Subsequently, the specimens were fired for two, four and six days with intermediate grindings, followed by a final grinding before the specimens were pressed into pellets. The pellets were annealed in (0.1 MPa = 1 atm) of oxygen for two days at 955-970 °C followed by slow cooling at 1 °C/min to 450 °C where they remained for 18 h before a final slow cool to room temperature."
Formula: Y1-xPrxBa2Cu3Oy
Informal Name: Y:123
Chemical Family: Y(Pr)-Ba-Cu-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:

Critical Temperature for Y:123; [Y(Pr)-Ba-Cu-O]
x of Prx (formula units) y of Oy (formula units) ΔTc (90%-10%) (K) Critical Temperature (K)
0 6.96 0.7 92.0
0.05 6.96 0.7 91.4
0.10 6.97 0.9 87.7
0.15 6.97 1.4 81.3
0.20 6.96 1.9 74.0
0.30 6.97 2.6 58.3
0.40 6.98 3.5 44.1
0.50 6.95 6.3 25.7
0.53 6.96 8.0 9.7
Measurement Method: Four-probe method
"The electrical resistivity... was measured by means of a four lead AC technique at a frequency of 16 Hz." No additional measurement details were noted.

Cautions: Unevaluated Data
"(Tc) is defined as the temperature at which the electrical resistivity reaches (10%)...of its extrapolated normal state value."
Resistivity (normal state) for Y:123; [Y(Pr)-Ba-Cu-O]
x of Prx (formula units) y of Oy (formula units) Temperature (°C) Resistivity (normal state) (mΩ·cm)
0 6.96 295 0.50
0.05 6.96 295 0.70
0.10 6.97 295 1.08
0.15 6.97 295 1.04
0.20 6.96 295 1.17
0.30 6.97 295 1.44
0.40 6.98 295 1.59
0.50 6.95 295 1.99
0.53 6.96 295 2.01
Measurement Method: Four-probe method
"The electrical resistivity... was measured by means of a four lead AC technique at a frequency of 16 Hz." No additional measurement details were noted.

Cautions: Unevaluated Data