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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: High-Temperature Superconductivity in Y1-zCazSr2Cu2.5Fe0.5O6+x
Author(s): M.G. Smith, J. Chan, and J.B. Goodenough
Publication: Physica C Volume: 208 Issue: Not Available Year: 1993 Page(s): 412-418
Editor(s): Not Available
Publisher: Elsevier Science Publishers B.V.
Language: English
Notes: Not Available
Keywords: Material Specification, Crystallography, Critical Temperature, Magnetic Susceptibility, Thermoelectric Power

Materials and Properties

YSr:123; [Y(Ca)-Sr-Cu(Fe)-O]
Material Specification for YSr:123; [Y(Ca)-Sr-Cu(Fe)-O] Process: Solid State Reaction
Notes: "... samples were synthesized by solid-state reaction. Stoichiometric amounts of Y2O3, CaCO3, SrCO3, CuO, and Fe2O3 were mixed and ground. The resulting powders were placed in dense Al2O3 crucibles and annealed at 950 °C in air for 16-20 h. The samples were then ground, pressed into pellets, and sintered at 990 °C in air for 70 h with 2 intermediate grindings and pressings. The samples were ground and pressed one more time, annealed at 1040 °C in flowing O2 for 75 h and then slow-cooled to room temperature at 1 °C/min... The oxygen was determined by iodometric titration and has an absolute error limit of ±0.02."
Formula: Y1-xCaxSr2Cu2.5Fe0.5Oy
Informal Name: YSr:123
Chemical Family: Y(Ca)-Sr-Cu(Fe)-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:

Crystallography for YSr:123; [Y(Ca)-Sr-Cu(Fe)-O]
Crystal System: Tetragonal
Formula Units per Cell:
Space Group:
Cell Parameters
x of Cax (formula units) y of Oy (formula units) Temp K a Å b Å c Å
0.00 6.97 296 3.800(2) -- 11.37(4)
0.05 6.93 296 3.801(2) -- 11.39(5)
0.08 6.92 296 3.800(2) -- 11.39(6)
0.10 6.90 296 3.798(1) -- 11.39(4)
0.12 6.89 296 3.803(1) -- 11.41(4)
0.15 6.88 296 3.803(1) -- 11.41(4)
0.18 6.86 296 3.803(1) -- 11.41(4)
Measurement Method: X-ray diffraction
"Phase purity and crystalline structure... were determined by X-ray diffraction with CuKα radiation." No additional measurement details were noted.

Cautions: Evaluated Data
Critical Temperature for YSr:123; [Y(Ca)-Sr-Cu(Fe)-O]
x of Cax (formula units) y of Oy (formula units) Critical Temperature (K)
0.05 6.93 8
0.08 6.92 9
0.10 6.90 20
0.12 6.89 19
0.15 6.88 19
0.18 6.86 16
Measurement Method: SQUID magnetometer
"The superconducting transition temperature and volume fraction were determined by field-cooled magnetization data obtained on a SQUID magnetometer operating in an applied field of (796 A/m = 10 Oe)." No additional measurement details were noted.

Cautions: Evaluated Data
Magnetic Susceptibility for YSr:123; [Y(Ca)-Sr-Cu(Fe)-O]
x of Cax (formula units) Temperature (K) Magnetic Susceptibility (arbitrary)
0.00 6 0.001
0.00 10 0.001
0.00 12 0.001
0.00 14 0.000
0.00 20 0.000
0.00 26 0.000
0.05 6 -0.001
0.05 8 0.000
0.05 10 0.000
0.08 6 -0.004
0.08 8 -0.001
0.08 10 0.000
0.08 15 0.000
0.10 6 -0.014
0.10 8 -0.014
0.10 10 -0.014
0.10 12 -0.013
0.10 14 -0.011
0.10 16 -0.007
0.10 18 -0.003
0.10 20 0.000
0.12 4 -0.017
0.12 10 -0.020
0.12 13 -0.016
0.12 15 -0.011
0.12 16 -0.008
0.12 17 -0.005
0.12 18 -0.002
0.12 20 0.000
0.15 6 -0.018
0.15 8 -0.018
0.15 10 -0.017
0.15 12 -0.015
0.15 14 -0.011
0.15 16 -0.007
0.15 18 -0.002
0.18 5 -0.015
0.18 6 -0.015
0.18 8 -0.013
0.18 11 -0.009
0.18 14 -0.003
0.18 15 -0.002
0.18 16 0.000
Measurement Method: SQUID magnetometer
"The superconducting transition temperature and volume fraction were determined by field-cooled magnetization data obtained on a SQUID magnetometer operating in an applied field of (796 A/m = 10 Oe)." No additional measurement details were noted.

Cautions: Evaluated Data
Digitized data were obtained from Figure 1 of the paper.
Thermoelectric Power for YSr:123; [Y(Ca)-Sr-Cu(Fe)-O]
x of Cax (formula units) Temperature (K) Thermoelectric Power (µV/K)
0.00 10 5.9
0.00 42 8.2
0.00 50 9.4
0.00 60 9.1
0.00 71 10.0
0.00 100 11.4
0.00 110 10.3
0.00 129 11.4
0.00 140 10.4
0.00 158 10.1
0.00 171 9.2
0.00 179 9.5
0.00 190 8.4
0.00 200 8.2
0.00 208 8.4
0.00 219 7.3
0.00 229 7.5
0.00 269 5.7
0.00 279 5.7
0.00 290 5.0
0.00 300 4.7
0.05 8 2.8
0.05 19 3.3
0.05 30 6.6
0.05 60 9.3
0.05 70 8.9
0.05 81 9.8
0.05 91 9.4
0.05 110 9.6
0.05 131 9.6
0.05 141 9.0
0.05 152 9.4
0.05 162 7.5
0.05 179 7.5
0.05 192 7.2
0.05 240 4.8
0.05 250 5.0
0.05 260 4.3
0.05 313 2.1
0.12 10 0.0
0.12 21 -0.1
0.12 30 1.7
0.12 41 5.8
0.12 49 6.7
0.12 60 6.7
0.12 81 6.9
0.12 101 6.3
0.12 112 6.2
0.12 128 5.7
0.12 141 5.1
0.12 292 0.1
0.12 312 0.9
0.15 10 0.5
0.15 21 0.2
0.15 31 2.2
0.15 40 6.1
0.15 71 6.8
0.15 81 6.7
0.15 100 6.4
0.15 110 5.4
0.15 119 5.7
0.15 140 5.0
0.15 150 4.8
0.15 200 4.3
0.15 250 2.6
Measurement Method: Thermopower measurement
"Seebeck measurements were made on the polycrystalline pellets with a home-built device... properties were measured while the sample was in thermal equilibrium." No additional measurement details were noted.

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