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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: Thermal-Expansion, Specific-Heat, and Pressure Dependence of Tc in YBa2(Cu1-xMx)3O7-δ:M=Fe and Zn
Author(s): C. Meingast, T. Ahrens, B. Blank, H. Burkle, B. Rudolf, and H. Wuhl
Publication: Physica C Volume: 173 Issue: Not Available Year: 1991 Page(s): 309-321
Editor(s): Not Available
Publisher: Elsevier Science Publishers B.V.
Language: English
Notes: Not Available
Keywords: Material Specification, Critical Temperature, Specific Heat, Thermal Expansion

Materials and Properties

Y:123; [Y-Ba-Cu(Fe)-O]
Y:123; [Y-Ba-Cu(Zn)-O]
Material Specification for Y:123; [Y-Ba-Cu(Fe)-O] Process: Sintering
Notes: "Polycrystalline pellets... were prepared by a modified standard sintering process. To insure a homogeneous distribution of the substitute, the starting materials (metal oxides and BaCO3) were mixed stepwise beginning with CuO and the substituting metal oxide. After at least 48 h of mixing, the resulting powders were pressed into pellets and sintered in air at 925 °C for 65 h. Then, the temperature was decreased to 400 °C within 6 h and held constant for about 48 h. This product was reground, pressed into pellets again and sintered as described above. Finally, the pellets were annealed in flowing oxygen at 450 °C for 70 h."
Formula: YBa2Cu3-xFexO7-y
Informal Name: Y:123
Chemical Family: Y-Ba-Cu(Fe)-O
Chemical Class: Oxide
Structure Type:
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:

Critical Temperature for Y:123; [Y-Ba-Cu(Fe)-O]
x (formula units) ΔTc (K) Critical Temperature (K)
0.00 0.7 92.0
0.03 1.3 90.6
0.075 3.0 85.0
0.15 5.0 72.0
Measurement Method: Unknown Tc method
The authors cite G. Roth et al., Physica C, Vol. 162-164, 518 (1989), and summarize the procedure as follows. "Inductively measured Tc values are presented..." No additional measurement details were noted.

Cautions: Unevaluated Data
Specific Heat for Y:123; [Y-Ba-Cu(Fe)-O]
x (formula units) Temperature (K) Specific Heat (J kg-1 K-1)
0.0 66 123
0.0 72 139
0.0 76 150
0.0 81 165
0.0 88 183
0.0 91 193
0.0 92 191
0.0 93 190
0.0 96 197
0.0 100 206
0.03 66 124
0.03 68 128
0.03 71 137
0.03 74 145
0.03 78 156
0.03 82 166
0.03 87 181
0.03 89 187
0.03 90 190
0.03 91 189
0.03 93 190
0.03 95 194
0.03 100 205
0.075 66 124
0.075 69 132
0.075 73 142
0.075 77 152
0.075 82 167
0.075 84 171
0.075 89 183
0.075 92 188
0.075 100 205
0.15 66 122
0.15 69 131
0.15 72 140
0.15 76 149
0.15 83 166
0.15 90 182
0.15 95 194
0.15 100 206
Measurement Method: Adiabatic calorimeter
"Specific heat was measured with a continuous-heating adiabatic calorimeter." No additional measurement details were noted.

Cautions: Evaluated Data
Data were digitized from Figure 3 of the paper.
Thermal Expansion for Y:123; [Y-Ba-Cu(Fe)-O]
x (formula units) Temperature (K) Thermal Expansion (10-6 K-1)
0.00 17 0.1
0.00 27 0.5
0.00 34 0.9
0.00 43 1.5
0.00 50 2.2
0.00 57 2.7
0.00 65 3.2
0.00 74 3.9
0.00 86 4.7
0.00 96 5.5
0.00 110 6.2
0.00 124 6.9
0.00 140 7.5
0.00 155 8.3
0.00 178 8.9
0.00 193 9.5
0.00 207 9.8
0.00 227 10.2
0.00 242 10.7
0.00 270 11.1
0.00 298 11.4
0.03 22 0.2
0.03 28 0.5
0.03 39 1.0
0.03 47 1.6
0.03 53 2.2
0.03 60 2.7
0.03 68 3.0
0.03 76 3.4
0.03 91 4.4
0.03 104 5.1
0.03 118 5.9
0.03 135 6.6
0.03 156 7.4
0.03 178 8.3
0.03 198 8.9
0.03 220 9.5
0.03 233 10.0
0.03 255 10.4
0.03 276 10.9
0.03 284 11.0
0.03 299 11.3
0.075 21 0.2
0.075 38 1.1
0.075 38 1.1
0.075 45 1.8
0.075 53 2.5
0.075 68 3.4
0.075 80 4.4
0.075 95 5.1
0.075 95 5.2
0.075 112 6.0
0.075 126 6.8
0.075 147 7.6
0.075 168 8.5
0.075 197 9.3
0.075 212 9.7
0.075 225 10.0
0.075 239 10.4
0.075 254 10.7
0.075 269 11.0
0.075 284 11.3
0.075 293 11.5
0.15 12 0.0
0.15 18 0.3
0.15 26 0.8
0.15 32 1.5
0.15 39 2.0
0.15 47 3.6
0.15 52 3.3
0.15 58 3.7
0.15 64 4.4
0.15 72 4.7
0.15 93 6.2
0.15 105 7.0
0.15 130 8.4
0.15 152 9.3
0.15 170 10.0
0.15 202 11.1
0.15 220 11.9
0.15 224 12.0
0.15 256 11.7
0.15 272 11.4
0.15 299 11.6
Measurement Method: Capacitance dilatometer
The authors cite C. Meingast et al., Phys. Rev. B, Vol. 41, 11299 (1990), and summarize the procedure as follows. "Expansivity was measured with a high-resolution capacitance dilatometer, in which the temperature is swept at a very smooth and nearly constant rate of about 6 mK/s."

Cautions: Evaluated Data
Data were digitized from Figure 1 of the paper.
Material Specification for Y:123; [Y-Ba-Cu(Zn)-O] Process: Solid State Reaction
Notes: "Polycrystalline pellets... were prepared by a modified standard sintering process. To insure a homogeneous distribution of the substitute, the starting materials (metal oxides and BaCO3) were mixed stepwise beginning with CuO and the substituting metal oxide. After at least 48 h of mixing, the resulting powders were pressed into pellets and sintered in air at 925 °C for 65 h. Then, the temperature was decreased to 400 °C within 6 h and held constant for about 48 h. This product was reground, pressed into pellets again and sintered as described above. Finally, the pellets were annealed in flowing oxygen at 450 °C for 70 h."
Formula: YBa2Cu3-xZnxO7-y
Informal Name: Y:123
Chemical Family: Y-Ba-Cu(Zn)-O
Chemical Class: Oxide
Structure Type:
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:

Critical Temperature for Y:123; [Y-Ba-Cu(Zn)-O]
x (formula units) ΔTc (K) Critical Temperature (K)
0.00 0.7 92
0.03 1.0 78
0.075 1.0 62
0.15 1.5 36
Measurement Method: Unknown Tc method
The authors cite G. Roth et al., Physica C, Vol. 162-164, 518 (1989), and summarize the procedure as follows. "Inductively measured Tc values are presented..." No additional measurement details were noted.

Cautions: Unevaluated Data
Thermal Expansion for Y:123; [Y-Ba-Cu(Zn)-O]
x (formula units) Temperature (K) Thermal Expansion (10-6 K-1)
0.0 7 0.1
0.0 34 1.1
0.0 55 2.7
0.0 87 4.7
0.0 129 7.1
0.0 170 8.7
0.0 220 10.2
0.0 256 11.0
0.0 282 11.4
0.0 300 11.7
0.03 20 0.0
0.03 38 1.1
0.03 65 2.8
0.03 117 6.0
0.03 176 8.6
0.03 234 10.1
0.03 260 10.7
0.03 270 11.0
0.03 296 11.4
0.075 15 0.2
0.075 34 1.2
0.075 61 3.3
0.075 84 4.8
0.075 125 7.4
0.075 154 8.5
0.075 185 9.6
0.075 221 10.8
0.075 234 11.6
0.075 245 12.1
0.075 257 11.7
0.075 270 10.7
0.075 287 11.0
0.075 299 11.2
0.15 17 0.2
0.15 50 2.0
0.15 78 4.1
0.15 116 6.4
0.15 164 8.5
0.15 194 9.5
0.15 240 10.7
0.15 272 11.2
0.15 300 11.7
Measurement Method: Capacitance dilatometer
The authors cite C. Meingast et al., Phys. Rev. B, Vol. 41, 11299 (1990), and summarize the procedure as follows. "Expansivity was measured with a high-resolution capacitance dilatometer, in which the temperature is swept at a very smooth and nearly constant rate of about 6 mK/s."

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