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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: Transport Properties of the Oxides Y1-xPrxBa2Cu3- O7-δ (O ≤x ≤1): Effects of Band Filling and Lattice Distortion on Superconductivity
Author(s): A.P. Goncalves, I.C. Santos, E.B. Lopes, R.T. Henriques, M. Almeida, and M.O. Figueiredo
Publication: Physical Review B Volume: 37 Issue: 13 Year: 1988 Page(s): 7476-7481
Editor(s): Not Available
Publisher: American Physical Society
Language: English
Notes: Not Available
Keywords: Material Specification, Critical Temperature, Resistivity (normal state), Thermoelectric Power

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: "All samples... were synthesized by the solid-state reaction of the appropriate amounts of Y2O3 (99.99%, Ventron), Pr2O3 (99.9%, Pechiney-St. Gobain), BaCO3 (99.5%, Carlo Erba RPE-ACS), and CuO (99.999%, Ventron). A mixture of fine powders of the starting materials was first fired as a pellet in air of 850 °C for 12 h, followed by slow cooling in the furnace. Then this pellet was again milled in an agate vial and repressed as a pellet with 12 mm diameter and... 1 mm thickness at (0.8 GPa = 8 kbar) and reheated at 850 °C during 12 h in air. Finally, the samples were submitted to a heat treatment under pure oxygen atmosphere, 16 h at 600 °C, and then cooled at a rate of 30 °C/h."
Formula: Y1-xPrxBa2Cu3O7-y
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) T(90%) (K) T(10%) (K) Critical Temperature (K)
0.0 94.4 92.9 92.6
0.1 90.8 89.0 88.6
0.2 79.6 77.2 76.4
0.3 68.0 61.9 60.5
0.4 57.2 46.0 44.0
0.5 38.0 29.2 28.7
Measurement Method: Four-probe method
"Resistivity measurements were performed in bar-shaped samples approximately 5x1.5x1.5 mm3 cut from the pellets, by a standard four-probe technique, using a lock-in amplifier (EG&G/PAR 5301) at a low frequency (27 Hz). Four in-line silver electrodes were evaporated onto the sample, and silver wires were glued to them with platinum paint (Demetron 308A). The current density was approximately 102 mA/cm2 and the resolution of the voltage measurements was 10-8 V."

Cautions: Evaluated Data
Resistivity (normal state) for Y:123; [Y(Pr)-Ba-Cu-O]
x of Prx (formula units) Temperature (K) Resistivity (normal state) (mΩ·cm)
0.0 93 0.11
0.0 94 0.47
0.0 103 0.59
0.0 143 0.74
0.0 215 0.94
0.0 298 1.14
0.2 77 0.16
0.2 80 0.61
0.2 96 0.80
0.2 172 1.11
0.2 223 1.28
0.2 299 1.49
0.3 62 0.13
0.3 65 0.51
0.3 68 1.12
0.3 79 1.40
0.3 155 1.71
0.3 298 2.02
0.5 29 0.11
0.5 33 1.27
0.5 37 2.24
0.5 53 2.25
0.5 122 2.20
0.5 298 2.62
0.6 20 39.9
0.6 55 17.6
0.6 100 12.0
0.6 160 9.8
0.6 229 8.0
0.6 280 7.1
Measurement Method: Four-probe method
"Resistivity measurements were performed in bar-shaped samples approximately 5x1.5x1.5 mm3 cut from the pellets, by a standard four-probe technique, using a lock-in amplifier (EG&G/PAR 5301) at a low frequency (27 Hz). Four in-line silver electrodes were evaporated onto the sample, and silver wires were glued to them with platinum paint (Demetron 308A). The current density was approximately 102 mA/cm2 and the resolution of the voltage measurements was 10-8 V."

Cautions: Evaluated Data
Digitized data were obtained from Figure 1 of the paper.
Thermoelectric Power for Y:123; [Y(Pr)-Ba-Cu-O]
x of Prx (formula units) Temperature (K) Thermoelectric Power (µV/K)
0.00 81 0.1
0.00 90 0.0
0.00 96 0.7
0.00 100 0.7
0.00 101 0.5
0.00 122 0.3
0.00 158 0.5
0.00 199 0.9
0.00 245 1.3
0.00 282 1.4
0.10 79 0.0
0.10 87 0.5
0.10 87 1.1
0.10 92 1.4
0.10 89 3.2
0.10 93 3.5
0.10 93 4.1
0.10 90 5.3
0.10 90 6.9
0.10 95 7.1
0.10 128 5.0
0.10 144 4.0
0.10 192 2.7
0.10 234 2.4
0.10 260 2.2
0.10 267 2.2
0.10 297 2.1
0.4 20 0.8
0.4 28 0.5
0.4 41 0.8
0.4 57 14.1
0.4 82 20.1
0.4 122 21.7
0.4 170 20.1
0.4 216 18.4
0.4 271 15.9
0.4 295 15.3
0.5 20 0.8
0.5 24 0.3
0.5 28 0.5
0.5 30 2.7
0.5 34 16.9
0.5 50 22.6
0.5 69 24.5
0.5 65 25.3
0.5 95 28.6
0.5 109 29.4
0.5 146 27.2
0.5 176 26.3
0.5 187 26.3
0.5 196 24.7
0.5 207 24.7
0.5 218 23.6
0.5 233 22.8
0.5 245 21.9
0.5 262 21.1
0.5 275 20.5
0.6 11 14.2
0.6 25 24.8
0.6 23 28.4
0.6 32 30.7
0.6 83 49.5
0.6 139 59.8
0.6 200 57.0
0.6 243 49.6
0.6 291 41.0
Measurement Method: Thermopower measurement
The authors cite P.M. Chaikin et al., Rev. Sci. Instrum., Vol. 46, 218 (1975), and summarize the procedure as follows. "Thermoelectric power was measured by a slow ac (...0.01 Hz) technique....The small elongated samples approximately 4x1x0.5 mm3, with evaporated silver contacts at the ends, were mounted with platinum paint between two 25 µm, high-purity gold foils (99.99% Goodfellow Metals) connected to two thermal reservoirs of quartz inside a vacuum chamber. The temperature gradients used were always smaller than 2 K and were measured using either gold-0.7 at.% Fe versus Chromel or copper versus Constantan thermocouples, depending on the temperature range. The experimental conditions used enabled us to have measurements with a resolution better than 0.1% or 0.1 µV/K-1, whichever is the greater. Absolute thermoelectric power was calculated after correction for the absolute thermoelectric power of the gold leads..."

Cautions: Evaluated Data
Digitized data were obtained from Figure 2 of the paper.