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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: Specific Heat of an YBa2Cu3O7 Single Crystal in Fields up to 20 T
Author(s): A. Junod, E. Bonjour, R. Calemczuk, J.Y. Henry, J. Muller, G. Triscone, and J.C. Vallier
Publication: Physica C Volume: 211 Issue: Not Available Year: 1993 Page(s): 304-318
Editor(s): Not Available
Publisher: Elsevier Science Publishers B.V.
Language: English
Notes: Not Available
Keywords: Material Specification, Specific Heat

Materials and Properties

Y:123; [Y-Ba-Cu-O]
Material Specification for Y:123; [Y-Ba-Cu-O] Process: Crystal Growth
Notes: The authors cite J. Rossat-Mignod et al., Physica B, Vol. 181, 383 (1992), and summarize the procedure as follows. "The... single crystal... was obtained by a recrystallization/mineralization technique... A piece 0.13126 g in mass was cut with approximate dimensions 2 x 2 x 5 mm3. The thickness along the c-axis is (about) 2mmm. The accuracy of the sample alignment (made by optical blaze) is estimated to be ±5°... The oxidation was performed under one atmosphere of oxygen according to the following program: heating at 5 °C/min up to 675 °C, 8 h at 675 °C, cooling at 5 °C/min down to 530 °C, 6 °C/h down to 490 °C, 4 °C/h down to 400 °C, 3 °C/h down to 340 °C, and 2 °C/h down to 290 °C."
Formula: YBa2Cu3O7-x
Informal Name: Y:123
Chemical Family: Y-Ba-Cu-O
Chemical Class: Oxide
Structure Type: Single Crystal
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:

Specific Heat for Y:123; [Y-Ba-Cu-O]
Field Direction () Magnetic Field (T) Temperature (K) Specific Heat (J kg-1 K-1)
H//c 0 80 160
H//c 0 83 168
H//c 0 85 174
H//c 0 88 181
H//c 0 90 184
H//c 0 93 188
H//c 0 95 193
H//c 0 99 203
H//c 2.5 80 160
H//c 2.5 83 169
H//c 2.5 85 174
H//c 2.5 86 177
H//c 2.5 88 179
H//c 2.5 90 183
H//c 2.5 93 188
H//c 2.5 95 193
H//c 2.5 99 203
H//c 5 80 160
H//c 5 83 169
H//c 5 85 173
H//c 5 88 179
H//c 5 90 183
H//c 5 93 188
H//c 5 95 193
H//c 5 99 203
H//c 7.5 80 161
H//c 7.5 83 168
H//c 7.5 85 172
H//c 7.5 88 178
H//c 7.5 90 182
H//c 7.5 93 188
H//c 7.5 95 193
H//c 7.5 99 204
H//c 10 80 160
H//c 10 82 165
H//c 10 83 167
H//c 10 85 172
H//c 10 88 178
H//c 10 90 182
H//c 10 93 188
H//c 10 95 193
H//c 10 99 204
H//c 15 80 160
H//c 15 83 167
H//c 15 85 172
H//c 15 88 178
H//c 15 90 182
H//c 15 93 189
H//c 15 95 193
H//c 15 99 203
H//c 20 80 160
H//c 20 83 166
H//c 20 85 171
H//c 20 88 177
H//c 20 90 183
H//c 20 93 188
H//c 20 95 193
H//c 20 99 203
H//ab 0 80 160
H//ab 0 85 174
H//ab 0 88 181
H//ab 0 90 183
H//ab 0 92 187
H//ab 0 95 194
H//ab 0 99 204
H//ab 5 80 160
H//ab 5 85 174
H//ab 5 86 178
H//ab 5 88 180
H//ab 5 90 183
H//ab 5 92 187
H//ab 5 99 203
H//ab 10 80 160
H//ab 10 85 175
H//ab 10 88 179
H//ab 10 90 183
H//ab 10 92 188
H//ab 10 95 194
H//ab 10 99 204
H//ab 15 80 161
H//ab 15 85 174
H//ab 15 88 179
H//ab 15 90 182
H//ab 15 92 188
H//ab 15 95 194
H//ab 15 99 203
H//ab 17 80 160
H//ab 17 85 174
H//ab 17 88 179
H//ab 17 90 183
H//ab 17 92 187
H//ab 17 95 194
H//ab 17 99 203
Measurement Method: Adiabatic calorimeter
"The design used here is an improved version of the adiabatic, continuous heating technique... The approximately constant power is set to obtain a predetermined average heating rate. The instantaneous heating rate reflects the variations of the heat capacity. The sample is attached to a sapphire sample holder using GE7031 varnish. A platinum film thermometer and a heater made of a chip resistor are glued to the backside of the sapphire. A chromel-constantan thermocouple monitors the temperature difference between the sapphire and the inner adiabatic shield. A second thermocouple measures the temperature difference between the inner and the outer shields. The assembly is mounted on a plug that ensures both electrical and thermal connections. The outer diameter of the vacuum can, 30 mm, fits into the standard variable temperature insert of 50 mm bore magnets."

Cautions: Evaluated Data
Digitized data were obtained from Figure 7a and 7b of the paper.