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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: Influence of Hole Filling and Pair Breaking by Pr and Hole Doping by Ca on Superconductivity and Flux Pinning of YBa2Cu3O6.83
Author(s): G.K. Bichile, S. Deshmukh, D.G. Kuberkar, and R.G. Kulkarni
Publication: Physica C Volume: 183 Issue: Not Available Year: 1991 Page(s): 154-162
Editor(s): Not Available
Publisher: Elsevier Science Publishers B.V.
Language: English
Notes: Not Available
Keywords: Material Specification, Crystallography, Critical Temperature, Critical Current Density, Magnetic Susceptibility

Materials and Properties

Y:123; [Y(Ca,Pr)-Ba-Cu-O]
Material Specification for Y:123; [Y(Ca,Pr)-Ba-Cu-O] Process: Solid State Reaction
Notes: The authors cite G.K. Bichile et al., Supercond. Sci. Technol., Vol. 4, 57 (1991), and summarize the procedure as follows. "A series of compounds... were synthesized by a standard ceramic technique under identical conditions. Stoichiometric quantities of fine powders of Y2O3, BaCo3, CuO, Pr6O11 and CaO (all 99.9% pure) were throughly mixed and heated in air at 950 °C for 24 h in a platinum crucible. Following the reaction, the powder was reground and reheated at 950 °C for 24 h to obtain a homogeneous, single-phase sample. The black product was then pulverized and cold pressed into pellets which were sintered in air at 950 °C for 24 h. To obtain fully oxygenated samples, these pellets were annealed under oxygen flow at 450 °C for 12 h, followed by slow cooling at the rate of 1 K/min until room temperature was reached."
Formula: Y1-x-yPrxCayBa2Cu3O Informal Name: Y:123
Chemical Family: Y(Ca,Pr)-Ba-Cu-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:
Crystallography for Y:123; [Y(Ca,Pr)-Ba-Cu-O]
Crystal System: Orthorhombic
Formula Units per Cell:
Space Group:
Cell Parameters
x of Prx, y of Cay (formula units) z of Oz (formula units) Temp K a Å b Å c Å
0.00, 0.00 6.83 296 3.8217(5) 3.8875(5) 11.667(1)
0.05, 0.00 6.85 296 3.8138(5) 3.8842(5) 11.650(1)
0.10, 0.00 6.82 296 3.8198(5) 3.8841(5) 11.648(1)
0.15, 0.00 6.84 296 3.8165(5) 3.8871(5) 11.662(1)
0.20, 0.00 6.81 296 3.8261(5) 3.8885(5) 11.669(1)
0.15, 0.05 6.82 296 3.8050(5) 3.8734(5) 11.624(1)
0.05, 0.15 6.83 296 3.8190(5) 3.8811(5) 11.642(1)
0.00, 0.05 6.79 296 3.8009(5) 3.8830(5) 11.646(1)
0.00, 0.10 6.67 296 3.8409(5) 3.8897(5) 11.689(1)
0.00, 0.15 6.65 296 3.8189(5) 3.8866(5) 11.655(1)
0.00, 0.20 6.64 296 3.8219(5) 3.8723(5) 11.617(1)
Measurement Method: X-ray diffraction
"All the samples were characterized at room temperature by X-ray diffraction using CuKα radiation... The observed X-ray diffraction peaks were modelled by modified Gaussian functions, and the refined unit cell parameters (were) calculated using the standard least squares programme..."

Cautions: Evaluated Data
Critical Temperature for Y:123; [Y(Ca,Pr)-Ba-Cu-O]
x of Prx (formula units) y of Cay (formula units) z of Oz (formula units) Tc(onset) (K) Critical Temperature (K)
0.0 0.0 6.83 93 91
0.05 0.0 6.85 90 79
0.10 0.0 6.82 86 77
0.15 0.0 6.84 82 68
0.20 0.0 6.81 73 62
0.15 0.05 6.82 86 75
0.05 0.15 6.83 89 85
0.0 0.05 6.79 91 80
0.0 0.10 6.67 90 79
0.0 0.15 6.65 87 80
0.0 0.20 6.64 85 78
Measurement Method: Four-probe method
"Resistivity was measured as a function of temperature on regularly shaped samples using the standard four-probe method." No additional measurement details were noted.

Cautions: Unevaluated Data
Critical Current Density for Y:123; [Y(Ca,Pr)-Ba-Cu-O]
x of Prx (formula units) y of Cay (formula units) Temperature (K) Magnetic Field (kA/m) Critical Current Density (kA/cm2)
0.1 0 13 140 940
0.1 0 13 250 700
0.1 0 13 410 520
0.1 0 13 490 450
0.1 0 13 640 380
0.1 0 13 720 340
0.1 0 25 90 470
0.1 0 25 250 260
0.1 0 25 330 220
0.1 0 25 400 210
0.1 0 25 480 195
0.1 0 25 560 180
0.1 0 25 640 180
0.1 0 25 720 160
0.1 0 40 90 270
0.1 0 40 240 130
0.1 0 40 410 98
0.1 0 40 560 84
0.1 0 40 720 75
0.1 0 50 80 150
0.1 0 50 240 74
0.1 0 50 410 57
0.1 0 50 640 45
0.1 0 50 720 39
0.1 0 60 80 77
0.1 0 60 240 41
0.1 0 60 410 32
0.1 0 60 560 26
0.1 0 60 720 19
0.1 0 70 80 26
0.1 0 70 240 12
0.1 0 70 400 9.0
0.1 0 70 560 7.7
0.1 0 70 630 6.7
0.1 0 70 710 6.7
0.15 0.05 13 80 970
0.15 0.05 13 250 570
0.15 0.05 13 410 430
0.15 0.05 13 560 360
0.15 0.05 13 720 300
0.15 0.05 25 90 410
0.15 0.05 25 170 280
0.15 0.05 25 250 210
0.15 0.05 25 400 165
0.15 0.05 25 560 150
0.15 0.05 25 720 130
0.15 0.05 40 80 170
0.15 0.05 40 160 110
0.15 0.05 40 320 74
0.15 0.05 40 480 62
0.15 0.05 40 720 58
0.15 0.05 50 80 89
0.15 0.05 50 170 56
0.15 0.05 50 320 39
0.15 0.05 50 480 35
0.15 0.05 50 640 32
0.15 0.05 50 725 31
0.15 0.05 60 80 28
0.15 0.05 60 170 18
0.15 0.05 60 240 13
0.15 0.05 60 320 12
0.15 0.05 60 400 11
0.15 0.05 60 480 11
0.15 0.05 60 640 10
0.15 0.05 60 710 9.1
0.15 0.05 60 720 9.1
0.15 0.05 70 40 5.5
0.15 0.05 70 80 2.6
0.15 0.05 70 150 1.8
0.15 0.05 70 240 1.5
0.15 0.05 70 320 1.4
0.2 0 13 90 530
0.2 0 13 170 360
0.2 0 13 320 230
0.2 0 13 480 195
0.2 0 13 640 170
0.2 0 13 720 150
0.2 0 25 90 190
0.2 0 25 250 110
0.2 0 25 400 85
0.2 0 25 560 77
0.2 0 25 720 68
0.2 0 40 90 69
0.2 0 40 160 44
0.2 0 40 330 30
0.2 0 40 410 30
0.2 0 40 490 28
0.2 0 40 640 25
0.2 0 40 720 21
0.2 0 50 80 28
0.2 0 50 160 18
0.2 0 50 240 15
0.2 0 50 320 12
0.2 0 50 400 12
0.2 0 50 480 11
0.2 0 50 640 8.4
0.2 0 50 710 7.7
0.2 0 60 40 6.7
0.2 0 60 160 2.4
0.2 0 60 280 1.5
0.2 0 60 320 1.4
Measurement Method: Dc magnetization
"DC magnetization measurements were performed using an EG and G PAR model 4500 vibrating sample magnetometer... with a (796 kA/m = 10 kOe) electromagnet. An APD closed cycle refrigerator cryostat was used to cool the samples... Pellets... were finely crushed to powders and the average particle diameter was measured... to be about 10 µm. The powdered samples were cooled in zero external field... From the width of the hysteresis loop, it is possible to estimate the Jc... using the Bean critical state model."

Cautions: Evaluated Data
Digitized data were obtained from Figure 6 of the paper.
Magnetic Susceptibility for Y:123; [Y(Ca,Pr)-Ba-Cu-O]
x of Prx (formula units) y of Cay (formula units) Temperature (K) Magnetic Susceptibility (arbitrary)
0.1 0 14 -6.6
0.1 0 25 -6.5
0.1 0 40 -5.5
0.1 0 50 -5.0
0.1 0 61 -4.3
0.1 0 70 -2.5
0.1 0 81 -0.6
0.1 0 85 0.0
0.1 0 89 0.0
0.2 0 13 -9.8
0.2 0 24 -9.8
0.2 0 40 -9.8
0.2 0 51 -9.7
0.2 0 60 -2.8
0.2 0 65 -0.7
0.2 0 70 0.0
0.15 0.05 14 -11.2
0.15 0.05 25 -11.3
0.15 0.05 41 -11.3
0.15 0.05 51 -6.0
0.15 0.05 60 -3.5
0.15 0.05 70 -1.9
0.15 0.05 75 -1.2
0.15 0.05 79 0.0
0.15 0.05 81 0.0
Measurement Method: Dc magnetization
"DC magnetization measurements were performed using an EG and G PAR model 4500 vibrating sample magnetometer... with a (796 kA/m = 10 kOe) electromagnet. An APD closed cycle refrigerator cryostat was used to cool the samples... Pellets... were finely crushed to powders and the average particle diameter was measured... to be about 10 µm. The powdered samples were cooled in zero external field... From the width of the hysteresis loop, it is possible to estimate the Jc... using the Bean critical state model."

Cautions: Evaluated Data
Digitized data were obtained from Figure 4 of the paper.