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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: Pressure Effects on Superconductivity and Structural Phase Transitions in La2-xMxCuO4 (M=Ba,Sr)
Author(s): N. Yamada and M. Ido
Publication: Physica C Volume: 203 Issue: Not Available Year: 1992 Page(s): 240-246
Editor(s): Not Available
Publisher: Elsevier Science Publishers B.V.
Language: English
Notes: Not Available
Keywords: Material Specification, Critical Temperature, Resistivity (normal state), Magnetic Susceptibility, Thermal Expansion

Materials and Properties

La:21; [la(sr)-cu-o]
La:21; [La(Ba)-Cu-O]
Material Specification for La:21; [La(Sr)-Cu-O] Process: Solid State Reaction
Notes: The authors cite N. Yamada et al., Solid State Commun., Vol. 70, 1151 (1989), and summarize the procedure as follows. "The La2-xBaxCuO4 crystals were prepared by firing La2O3, BaCO3 and CuO.... The La2-xSrxCuO4 crystals were prepared by firing La2O3, SrCO3 and CuO with the same process... Pressure was generated by use of a WC piston and a beryllium-copper cylinder with a 6 mm internal diameter. The transmitting liquid was a 1:1 mixture of kerosene and transformer oil. Pressure was applied at room temperature and kept constant in the course of cooling from room temperature. The pressure at room temperature was measured by use of a pressure-cycled manganine gauge."
Formula: La2-xSrxCuO4
Informal Name: La:21
Chemical Family: La(Sr)-Cu-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:

Critical Temperature for La:21; [La(Sr)-Cu-O]
x (formula units) Pressure (GPa) Critical Temperature (K)
0.15 0.00 37.5
0.15 0.62 38.5
0.15 0.91 39.2
0.15 1.22 39.7
0.15 1.53 40.7
0.15 1.81 40.9
0.15 2.03 41.3
0.16 0.00 37.5
0.16 0.63 38.4
0.16 0.94 38.9
0.16 1.22 39.4
0.16 1.50 39.7
0.16 1.81 39.8
0.16 2.03 39.8
0.17 0.00 36.5
0.17 0.31 36.8
0.17 0.63 37.4
0.17 0.91 37.9
0.17 1.22 38.4
0.17 1.50 38.6
0.17 1.82 38.6
0.17 2.00 38.6
0.18 0.00 34.3
0.18 0.41 34.7
0.18 0.60 35.0
0.18 0.91 35.2
0.18 1.23 34.9
0.18 1.54 35.1
0.18 1.79 35.1
0.18 2.01 35.1
0.19 0.00 31.7
0.19 0.42 32.2
0.19 0.60 32.2
0.19 0.92 32.4
0.19 1.23 32.4
0.19 1.51 32.2
0.19 2.01 32.6
0.206 0.00 26.7
0.206 0.39 27.4
0.206 0.61 27.4
0.206 0.93 27.0
0.206 1.21 27.4
0.206 1.52 27.2
0.22 0.00 21.2
0.22 0.41 21.2
0.22 0.81 21.2
0.22 1.22 21.4
0.22 1.63 21.4
0.22 2.03 21.4
Measurement Method: Ac susceptibility
"The diamagnetic susceptibility of superconductivity was measured by the usual AC method. Both a primary coil and a secondary one composed of balanced pair-coils were placed inside a pressure cell... In the present measurements, a magnetic field of (0.8 A/m = 0.01 Oe) with a frequency of 90 Hz was used."

Cautions: Evaluated Data
Digitized data were obtained from Figure 4 of the paper.
Resistivity (normal state) for La:21; [La(Sr)-Cu-O]
x (formula units) Pressure (GPa) Temperature (K) Resistivity (normal state) (mΩ·cm)
0.10 0.0 22 0.0
0.10 0.0 31 0.5
0.10 0.0 32 1.0
0.10 0.0 38 1.5
0.10 0.0 52 1.6
0.10 0.0 120 2.1
0.10 0.0 185 3.1
0.10 0.0 236 3.9
0.10 0.0 300 4.9
0.115 0.0 25 0.0
0.115 0.0 31 0.6
0.115 0.0 32 1.1
0.115 0.0 38 1.2
0.115 0.0 71 1.4
0.115 0.0 125 1.8
0.115 0.0 184 2.5
0.115 0.0 238 3.3
0.115 0.0 300 4.0
0.115 2.0 28 0.0
0.115 2.0 34 0.6
0.115 2.0 40 1.1
0.115 2.0 91 1.4
0.115 2.0 156 2.0
0.115 2.0 201 2.5
0.115 2.0 249 3.1
0.115 2.0 298 3.8
0.14 0.0 28 0.0
0.14 0.0 40 0.6
0.14 0.0 43 0.6
0.14 0.0 99 1.1
0.14 0.0 153 1.5
0.14 0.0 218 2.0
0.14 0.0 300 2.8
0.16 0.0 36 0.0
0.16 0.0 40 0.6
0.16 0.0 93 0.8
0.16 0.0 158 1.1
0.16 0.0 217 1.4
0.16 0.0 299 1.8
Measurement Method: Four-probe method
"The resistivity... was measured by the usual DC four-probe method. Electrical contacts were made with indium stuck on the surface of the sample." No additional measurement details were noted.

Cautions: Evaluated Data
Digitized data were obtained from Figure 10 of the paper.
Magnetic Susceptibility for La:21; [La(Sr)-Cu-O]
x (formula units) Pressure (GPa) Temperature (K) Magnetic Susceptibility (arbitrary)
0.17 0.0 25.0 -7.5
0.17 0.0 28.2 -7.4
0.17 0.0 32.5 -6.9
0.17 0.0 35.1 -4.7
0.17 0.0 36.1 -1.9
0.17 0.0 36.6 -0.5
0.17 0.0 37.1 -0.1
0.17 0.0 40.1 0.0
0.17 0.0 45.0 0.0
0.17 2.0 25.0 -8.4
0.17 2.0 29.0 -8.3
0.17 2.0 32.5 -8.1
0.17 2.0 35.1 -7.2
0.17 2.0 36.6 -4.8
0.17 2.0 37.5 -2.3
0.17 2.0 39.0 -0.7
0.17 2.0 40.6 -0.2
0.17 2.0 42.2 -0.1
0.22 0.0 10.2 -7.6
0.22 0.0 12.5 -7.3
0.22 0.0 16.5 -6.3
0.22 0.0 19.1 -4.7
0.22 0.0 20.5 -1.7
0.22 0.0 21.0 -0.6
0.22 0.0 22.6 0.0
0.22 0.0 25.0 0.0
0.22 2.0 10.2 -7.7
0.22 2.0 13.2 -7.4
0.22 2.0 15.6 -7.3
0.22 2.0 18.1 -5.9
0.22 2.0 20.2 -3.2
0.22 2.0 21.5 -0.6
0.22 2.0 23.1 -0.2
0.22 2.0 24.0 0.0
Measurement Method: Ac susceptibility
"The diamagnetic susceptibility of superconductivity was measured by the usual AC method. Both a primary coil and a secondary one composed of balanced pair-coils were placed inside a pressure cell... In the present measurements, a magnetic field of (0.8 A/m = 0.01 Oe) with a frequency of 90 Hz was used."

Cautions: Evaluated Data
Digitized data were obtained from Figure 3 of the paper.
Thermal Expansion for La:21; [La(Sr)-Cu-O]
x (formula unit) Pressure (GPa) Temperature (K) Thermal Expansion (10-6 K-1)
0.17 0.0 21 0.5
0.17 0.0 40 1.3
0.17 0.0 60 1.7
0.17 0.0 76 2.5
0.17 0.0 87 2.7
0.17 0.0 101 3.2
0.17 0.0 117 3.3
0.17 0.0 125 3.3
0.17 0.0 136 5.6
0.17 0.0 144 7.5
0.17 0.0 158 8.5
0.17 0.0 173 9.3
0.17 0.0 186 9.8
0.17 0.0 200 10.1
0.17 0.4 21 0.6
0.17 0.4 37 1.4
0.17 0.4 61 2.7
0.17 0.4 87 3.5
0.17 0.4 105 4.5
0.17 0.4 116 6.5
0.17 0.4 134 8.4
0.17 0.4 156 9.7
0.17 0.4 172 10.0
0.17 0.4 192 10.4
0.17 0.4 194 10.6
0.17 0.4 200 10.9
0.17 0.8 19 0.6
0.17 0.8 42 1.9
0.17 0.8 60 3.3
0.17 0.8 81 5.4
0.17 0.8 97 7.2
0.17 0.8 117 8.4
0.17 0.8 138 9.4
0.17 0.8 159 10.3
0.17 0.8 180 10.8
0.17 0.8 199 11.1
0.17 1.2 19 0.6
0.17 1.2 34 1.6
0.17 1.2 55 4.1
0.17 1.2 78 6.4
0.17 1.2 104 8.2
0.17 1.2 131 9.5
0.17 1.2 159 10.7
0.17 1.2 186 11.3
0.17 1.2 200 11.4
0.19 0.0 32 1.3
0.19 0.0 56 3.0
0.19 0.0 76 4.5
0.19 0.0 92 6.4
0.19 0.0 107 7.9
0.19 0.0 129 9.6
0.19 0.0 157 10.6
0.19 0.0 170 10.6
0.19 0.0 178 10.7
0.19 0.0 176 11.1
0.19 0.0 192 11.4
0.19 0.0 199 11.2
0.19 0.4 23 1.0
0.19 0.4 47 3.2
0.19 0.4 68 5.6
0.19 0.4 84 7.8
0.19 0.4 109 9.5
0.19 0.4 136 10.8
0.19 0.4 160 11.8
0.19 0.4 181 12.3
0.19 0.4 199 12.4
0.19 0.6 23 1.2
0.19 0.6 41 3.0
0.19 0.6 58 5.4
0.19 0.6 80 8.0
0.19 0.6 102 9.5
0.19 0.6 128 10.8
0.19 0.6 151 11.4
0.19 0.6 180 12.3
0.19 0.6 199 12.4
Measurement Method: Strain gauge method
"The thermal expansion coefficient... was measured... by means of a strain gauge method, where Cu of high purity was used as reference material. The reference material, as well as the sample, was placed inside the pressure cell. A chromel-alumel thermocouple was also placed inside the pressure cell in order to monitor the temperature."

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

Material Specification for La:21; [La(Ba)-Cu-O] Process: Solid State Reaction
Notes: The authors cite N. Yamada et al., Solid State Commun., Vol. 70, 1151 (1989), and summarize the procedure as follows. "The La2-xBaxCuO4 crystals were prepared by firing La2O3, BaCO3 and CuO.... The La2-xSrxCuO4 crystals were prepared by firing La2O3, SrCO3 and CuO with the same process... Pressure was generated by use of a WC piston and a beryllium-copper cylinder with a 6 mm internal diameter. The transmitting liquid was a 1:1 mixture of kerosene and transformer oil. Pressure was applied at room temperature and kept constant in the course of cooling from room temperature. The pressure at room temperature was measured by use of a pressure-cycled manganine gauge."
Formula: La2-xBaxCuO4
Informal Name: La:21
Chemical Family: La(Ba)-Cu-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:


Critical Temperature for La:21; [La(Ba)-Cu-O]
x (formula units) Pressure (GPa) Critical Temperature (K)
0.09 0.00 26.4
0.09 1.00 28.9
0.09 1.50 30.3
0.09 2.00 31.1
0.11 0.00 14.6
0.11 1.00 26.7
0.11 1.50 31.7
0.11 1.75 32.5
0.11 2.00 33.3
0.115 0.00 11.0
0.115 1.00 24.8
0.115 1.50 29.4
0.115 2.00 32.5
0.12 0.00 5.2
0.12 1.00 13.5
0.12 2.00 22.0
0.125 2.00 9.7
0.13 1.50 22.8
0.13 2.00 23.5
0.14 0.00 12.6
0.14 1.00 28.0
0.14 1.50 29.1
0.14 2.00 30.5
0.16 0.00 26.6
0.16 1.00 28.6
0.16 1.50 29.1
0.16 2.00 29.7
0.175 0.00 24.4
0.22 0.00 5.5
Measurement Method: Ac susceptibility
"The diamagnetic susceptibility of superconductivity was measured by the usual AC method. Both a primary coil and a secondary one composed of balanced pair-coils were placed inside a pressure cell... In the present measurements, a magnetic field of (0.8 A/m = 0.01 Oe) with a frequency of 90 Hz was used."

Cautions: Evaluated Data
Digitized data were obtained from Fig. 6 of the paper.
Resistivity (normal state) for La:21; [La(Ba)-Cu-O]
x (formula units) Pressure (GPa) Temperature (K) Resistivity (normal state) (mΩ·cm)
0.11 0.0 25 0.02
0.11 0.0 30 0.42
0.11 0.0 34 0.80
0.11 0.0 41 0.90
0.11 0.0 47 0.87
0.11 0.0 64 1.01
0.11 0.0 80 1.15
0.11 0.0 92 1.29
0.11 1.5 32 0.00
0.11 1.5 36 0.25
0.11 1.5 42 0.66
0.11 1.5 51 0.80
0.11 1.5 71 0.98
0.11 1.5 100 1.22
0.125 0.0 5 1.08
0.125 0.0 9 2.23
0.125 0.0 14 2.60
0.125 0.0 28 2.53
0.125 0.0 33 2.84
0.125 0.0 50 2.57
0.125 0.0 63 2.44
0.125 0.0 82 2.61
0.125 0.0 101 2.91
0.125 2.0 12 0.12
0.125 2.0 20 0.56
0.125 2.0 31 0.74
0.125 2.0 36 1.31
0.125 2.0 41 1.75
0.125 2.0 48 1.81
0.125 2.0 64 1.99
0.125 2.0 82 2.23
0.125 2.0 101 2.47
0.14 0.0 22 0.01
0.14 0.0 27 0.37
0.14 0.0 30 0.78
0.14 0.0 33 0.91
0.14 0.0 48 0.71
0.14 0.0 59 0.69
0.14 0.0 79 0.84
0.14 0.0 100 0.99
0.14 1.5 31 0.01
0.14 1.5 34 0.17
0.14 1.5 37 0.46
0.14 1.5 46 0.58
0.14 1.5 64 0.69
0.14 1.5 82 0.82
0.14 1.5 100 0.94
Measurement Method: Four-probe method
"The resistivity... was measured by the usual DC four-probe method. Electrical contacts were made with indium stuck on the surface of the sample." No additional measurement details were noted.

Cautions: Evaluated Data
Digitized data were obtained from Fig. 7 of the paper.
Magnetic Susceptibility for La:21; [La(Ba)-Cu-O]
x (formula units) Pressure (GPa) Temperature (K) Magnetic Susceptibility (arbitrary)
0.11 0.0 4 -9.0
0.11 0.0 9 -8.8
0.11 0.0 11 -8.1
0.11 0.0 13 -4.0
0.11 0.0 15 -1.4
0.11 0.0 20 0.0
0.11 0.0 25 0.0
0.11 1.0 4 -9.0
0.11 1.0 11 -9.0
0.11 1.0 16 -8.9
0.11 1.0 20 -8.3
0.11 1.0 23 -5.9
0.11 1.0 25 -2.4
0.11 1.0 26 -1.0
0.11 1.0 30 -0.1
0.11 1.0 35 -0.1
0.11 1.0 39 0.0
0.11 1.5 4 -9.2
0.11 1.5 12 -9.2
0.11 1.5 21 -9.1
0.11 1.5 25 -8.7
0.11 1.5 28 -6.5
0.11 1.5 31 -2.4
0.11 1.5 32 -0.9
0.11 1.5 35 -0.1
0.11 1.5 36 0.0
0.11 2.0 4 -9.4
0.11 2.0 11 -9.6
0.11 2.0 20 -9.5
0.11 2.0 25 -9.5
0.11 2.0 30 -8.3
0.11 2.0 32 -2.8
0.11 2.0 33 -1.1
0.11 2.0 37 -0.3
0.11 2.0 39 0.0
0.125 0.0 4 0.0
0.125 0.0 20 0.0
0.125 0.0 40 0.0
0.125 1.5 4 -8.1
0.125 1.5 7 -8.0
0.125 1.5 8 -5.1
0.125 1.5 9 -3.0
0.125 1.5 10 -0.4
0.125 1.5 11 0.0
0.125 2.0 4 -9.2
0.125 2.0 5 -9.2
0.125 2.0 7 -8.8
0.125 2.0 8 -6.3
0.125 2.0 9 -3.7
0.125 2.0 10 -0.2
0.125 2.0 11 0.0
0.14 0.0 4 -7.5
0.14 0.0 7 -7.1
0.14 0.0 10 -5.1
0.14 0.0 12 -1.4
0.14 0.0 13 0.0
0.14 0.0 20 0.0
0.14 1.0 4 -7.9
0.14 1.0 10 -7.9
0.14 1.0 15 -7.9
0.14 1.0 21 -7.7
0.14 1.0 26 -5.9
0.14 1.0 28 -2.8
0.14 1.0 30 -0.1
0.14 1.0 35 0.0
0.14 1.5 4 -7.9
0.14 1.5 10 -7.9
0.14 1.5 15 -7.9
0.14 1.5 20 -7.7
0.14 1.5 26 -7.3
0.14 1.5 27 -6.3
0.14 1.5 29 -0.9
0.14 1.5 30 -0.1
0.14 1.5 32 0.0
0.14 2.0 4 -8.8
0.14 2.0 10 -8.7
0.14 2.0 15 -8.7
0.14 2.0 20 -8.7
0.14 2.0 25 -8.3
0.14 2.0 28 -6.9
0.14 2.0 30 -2.4
0.14 2.0 31 -0.9
0.14 2.0 32 -0.1
0.14 2.0 35 0.0
Measurement Method: Ac susceptibility
"The diamagnetic susceptibility of superconductivity was measured by the usual AC method. Both a primary coil and a secondary one composed of balanced pair-coils were placed inside a pressure cell... In the present measurements, a magnetic field of (0.8 A/m = 0.01 Oe) with a frequency of 90 Hz was used."

Cautions: Evaluated Data
Digitized data were obtained from Figure 5 of the paper.