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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: Effect of Y-Ca Substitution Upon Superconductivity in the Oxide YBa2Cu3-xCoxO7-δ
Author(s): E. Suard, A. Maignan, V. Caignaert, and B. Raveau
Publication: Physica C Volume: 200 Issue: Not Available Year: 1992 Page(s): 43-49
Editor(s): Not Available
Publisher: Elsevier Science Publishers B.V.
Language: English
Notes: Not Available
Keywords: Material Specification, Crystallography, Critical Temperature, Magnetic Susceptibility

Materials and Properties

Y:123; [Y(Ca)-Ba-Cu(Co)-O]
Material Specification for Y:123; [Y(Ca)-Ba-Cu(Co)-O] Process: Solid State Reaction
Notes: "Samples were prepared by solid state reaction between BaCO3, Y2O3, CaCO3, CuO and Co3O4 in molar ratios according to the composition Y1-xCaxBa2Cu3-yCoyO7±δ. The mixtures were calcined in air at 950 °C for several days and reground. Then they were heated in an oxygen flow at 980 °C for 24 h, at 400 °C for 12 h and furnace cooled down to room temperature."
Formula: Y1-xCaxBa2Cu3-yCoyOz
Informal Name: Y:123
Chemical Family: Y(Ca)-Ba-Cu(Co)-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)-Ba-Cu(Co)-O]
Crystal System: Tetragonal
Formula Units per Cell:
Space Group:
Cell Parameters
x, y of Cax,Coy (formula units) z of Oz (formula units) Temp K a Å b Å c Å
0.12, 0.12 6.78 296 3.8611(3) -- 11.687(1)
0.15, 0.15 6.83 296 3.8615(6) -- 11.694(2)
0.24, 0.24 6.84 296 3.8633(6) -- 11.709(2)
0.30, 0.30 6.93 296 3.8647(3) -- 11.715(1)
0.36, 0.36 6.87 296 3.8659(6) -- 11.717(3)
0.42, 0.42 -- 296 3.8682(9) -- 11.716(3)
0.00, 0.15 6.92 296 3.8638(6) -- 11.678(2)
0.05, 0.15 6.82 296 3.8640(12) -- 11.684(3)
0.10, 0.15 6.91 296 3.8627(6) -- 11.690(2)
0.15, 0.15 6.83 296 3.8615(6) -- 11.694(2)
0.20, 0.15 6.74 296 3.8602(6) -- 11.705(2)
0.24, 0.15 6.80 296 3.8616(6) -- 11.691(2)
0.00, 0.45 7.00 296 3.8776(3) -- 11.666(2)
0.05, 0.45 6.91 296 3.8784(6) -- 11.668(2)
0.10, 0.45 7.02 296 3.8794(9) -- 11.677(3)
0.15, 0.45 7.08 296 3.8756(3) -- 11.685(2)
0.24, 0.45 6.93 296 3.8739(9) -- 11.687(3)
0.30, 0.45 6.84 296 3.8737(6) -- 11.689(2)
Measurement Method: X-ray diffraction
"The purity and the crystallographic parameters were established by powder X-ray diffraction using a Philips diffractometer working with CuKα radiation. The structure and parameters of the oxides were refined using the Rietveld program DBW 3.2."

Cautions: Evaluated Data
Critical Temperature for Y:123; [Y(Ca)-Ba-Cu(Co)-O]
x of Cax (formula units) y of Coy (formula units) z of Oz (formula units) Critical Temperature (K)
0.12 0.12 6.78 87
0.15 0.15 6.83 86
0.24 0.24 6.84 85
0.30 0.30 6.93 84
0.36 0.36 6.87 82
0.42 0.42 -- 79
0.00 0.15 6.92 71
0.05 0.15 6.82 83
0.10 0.15 6.91 84
0.15 0.15 6.83 86
0.20 0.15 6.74 86
0.24 0.15 6.80 86
0.00 0.45 7.00 0
0.05 0.45 6.91 0
0.10 0.45 7.02 18
0.15 0.45 7.08 30
0.24 0.45 6.93 51
0.30 0.45 6.84 53
Measurement Method: Ac susceptibility
"The susceptibility curves... were registered with a Lake Shore AC susceptometer, under a field of (0.5 mT = 5 G)." No additional measurement details were noted.

Cautions: Evaluated Data
Magnetic Susceptibility for Y:123; [Y(Ca)-Ba-Cu(Co)-O]
x of Cax (formula units) y of Coy (formula units) z of Oz (formula units) Temperature (K) Magnetic Susceptibility (arbitrary)
0 0.15 6.92 55 -0.71
0 0.15 6.92 60 -0.65
0 0.15 6.92 65 -0.51
0 0.15 6.92 72 -0.03
0 0.15 6.92 74 0.0
0.05 0.15 6.82 55 -0.65
0.05 0.15 6.82 60 -0.62
0.05 0.15 6.82 65 -0.56
0.05 0.15 6.82 68 -0.50
0.05 0.15 6.82 75 -0.15
0.05 0.15 6.82 77 -0.06
0.05 0.15 6.82 80 0.0
0.15 0.15 6.83 55 -0.73
0.15 0.15 6.83 60 -0.69
0.15 0.15 6.83 65 -0.66
0.15 0.15 6.83 70 -0.62
0.15 0.15 6.83 75 -0.57
0.15 0.15 6.83 80 -0.46
0.15 0.15 6.83 83 -0.29
0.15 0.15 6.83 85 -0.06
0.15 0.15 6.83 87 0.0
0.24 0.15 6.80 55 -0.86
0.24 0.15 6.80 60 -0.80
0.24 0.15 6.80 65 -0.76
0.24 0.15 6.80 70 -0.71
0.24 0.15 6.80 75 -0.65
0.24 0.15 6.80 78 -0.60
0.24 0.15 6.80 80 -0.51
0.24 0.15 6.80 83 -0.30
0.24 0.15 6.80 85 -0.06
0.24 0.15 6.80 87 0.0
0.10 0.45 7.02 11 -0.05
0.10 0.45 7.02 13 -0.03
0.10 0.45 7.02 15 -0.03
0.10 0.45 7.02 16 -0.02
0.10 0.45 7.02 19 -0.01
0.10 0.45 7.02 20 0.0
0.15 0.45 7.08 15 -0.39
0.15 0.45 7.08 20 -0.31
0.15 0.45 7.08 30 -0.06
0.15 0.45 7.08 35 -0.02
0.15 0.45 7.08 40 0.0
0.24 0.45 6.93 14 -0.63
0.24 0.45 6.93 20 -0.62
0.24 0.45 6.93 29 -0.58
0.24 0.45 6.93 35 -0.54
0.24 0.45 6.93 44 -0.28
0.24 0.45 6.93 50 -0.05
0.24 0.45 6.93 55 0.0
0.30 0.45 6.84 15 -0.72
0.30 0.45 6.84 20 -0.70
0.30 0.45 6.84 29 -0.64
0.30 0.45 6.84 36 -0.56
0.30 0.45 6.84 40 -0.44
0.30 0.45 6.84 44 -0.26
0.30 0.45 6.84 50 -0.11
0.30 0.45 6.84 55 -0.04
0.30 0.45 6.84 60 0.0
Measurement Method: Ac susceptibility
"The susceptibility curves... were registered with a Lake Shore AC susceptometer, under a field of (0.5 mT = 5 G)." No additional measurement details were noted.

Cautions: Evaluated Data
Digitized data were obtained from Figure 2 and 3a of the paper.