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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 Tc and Normal-State Resistivity in Nd1-xPrxBa2Cu3O7-δ System
Author(s): X.W. Cao, Y.J. Tang, and J.C. Ho
Publication: Physica C Volume: 259 Issue: Not Available Year: 1996 Page(s): 361-364
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

Nd:123; [Nd(Pr)-Ba-Cu-O]
Material Specification for Nd:123; [Nd(Pr)-Ba-Cu-O] Process: Solid State Reaction
Notes: "The samples of Nd1-xPrxBa2Cu3O7-δ with x = 0, 0.05, 0.1, 0.15, 0.2, 0.25 and 0.3 were prepared by solid-state reactions. In brief, high-purity ingredient powders of Nd2O3, Pr11O3, BaCO3 and CuO were first thoroughly mixed and calcined in air at 860 °C for 24 h. The product was reground and pelletized and sintered at 900 °C for 24 h. Then, two sintering processes of 920 °C for 12 h each, with intermediate grinding and pelletizing were carried out. For the second and the third sinterings, the samples were slowly cooled to 600 °C in 3 h and annealed at this temperature for 4 h in flowing oxygen, then cooled again in 2 h to 400 °C for another annealing for 8 h. Finally, the samples were cooled to room temperature in 3 h."
Formula: Nd1-xPrxBa2Cu3O7-y
Informal Name: Nd:123
Chemical Family: Nd(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 Nd:123; [Nd(Pr)-Ba-Cu-O]
x of Prx (formula units) Critical Temperature (K)
0.00 93
0.05 75
0.10 59
0.15 51
0.20 41
0.25 30
0.30 20
Measurement Method: Four-probe resistance
"A four-probe resistivity measurement was made in a closed-cycle refrigerator, with which a lowest temperature of about 17 K can be reached. The average rate of temperature reduction is about 1 K/min." No additional measurement details were noted.

Cautions: Unevaluated Data
Digitized data were obtained from Figure 2 of the paper.
Resistivity (normal state) for Nd:123; [Nd(Pr)-Ba-Cu-O]
x of Prx (formula units) Temperature (K) Resistivity (normal state) (mΩ·cm)
0.3 20 2.4
0.3 21 4.5
0.3 25 6.8
0.3 27 7.3
0.3 49 6.3
0.3 92 5.0
0.3 108 4.6
0.3 149 4.1
0.3 188 3.8
0.3 229 3.6
0.3 248 3.5
0.3 268 3.5
0.25 27 0.0
0.25 27 0.6
0.25 30 1.8
0.25 30 2.7
0.25 33 3.1
0.25 35 3.3
0.25 69 2.9
0.25 91 2.8
0.25 108 2.8
0.25 149 2.8
0.25 188 2.8
0.25 229 2.9
0.25 270 2.9
0.2 36 0.0
0.2 39 0.6
0.2 39 1.6
0.2 40 2.1
0.2 49 2.4
0.2 91 2.4
0.2 149 2.4
0.2 190 2.4
0.2 231 2.6
0.2 270 2.6
0.15 48 0.0
0.15 51 0.9
0.15 54 1.5
0.15 54 1.8
0.15 69 1.8
0.15 110 2.0
0.15 151 2.1
0.15 209 2.3
0.15 250 2.4
0.15 270 2.5
0.1 56 0.0
0.1 58 0.4
0.1 63 0.9
0.1 68 1.1
0.1 109 1.3
0.1 151 1.5
0.1 192 1.7
0.1 250 1.9
0.1 269 2.0
0.05 70 0.0
0.05 73 0.5
0.05 80 0.9
0.05 97 1.0
0.05 131 1.2
0.05 170 1.4
0.05 209 1.5
0.05 250 1.7
0.05 269 1.7
0.0 87 0.0
0.0 92 0.1
0.0 92 0.5
0.0 95 0.9
0.0 100 1.1
0.0 129 1.2
0.0 170 1.3
0.0 209 1.4
0.0 250 1.5
0.0 269 1.6
Measurement Method: Four-probe resistance
"A four-probe resistivity measurement was made in a closed-cycle refrigerator, with which a lowest temperature of about 17 K can be reached. The average rate of temperature reduction is about 1 K/min." No additional measurement details were noted.

Cautions: Unevaluated Data
Digitized data were obtained from Figure 1 of the paper.