Hts Logo

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: Anisotropic Transport Properties of Single-Crystal La2-xSrxCuO4: Evidence for the Dimensional Crossover
Author(s): Y. Nakamura and S. Uchida
Publication: Physical Review B Volume: 47 Issue: 13 Year: 1993 Page(s): 8369-8372
Editor(s): Not Available
Publisher: American Physical Society
Language: English
Notes: Not Available
Keywords: Material Specification, Resistivity (normal state), Thermoelectric Power

Materials and Properties

La:21; [La(Sr)-Cu-O]
Material Specification for La:21; [La(Sr)-Cu-O] Process: Floating Zone
Notes: The authors cite I. Tanaka et al., Nature, Vol. 337, 21 (1989), and summarize the procedure as follows. "Single crystals of La2-xSrxCuO4 were grown by the traveling-solvent-floating-zone... method... We first prepared a polycrystalline rod. Powders of La2O3 (dehydrated at 1000 °C for 10 h), SrCO3, and CuO with purities higher than 99.9% were mixed in the nominal ratios, well ground, and then sintered at 950 °C for 10 h in an alumina crucible. After regrinding the powder we isostatically pressed it into a rod shape (about 5 mm (diameter) x 80 mm) and sintered it again at 1200 °C for 20 h to get a high-density rod. Solvent material was also prepared in the same way except that the final sintering temperature was lower (about 950 °C)... Single-crystal growth was done using an infrared furnace with two halogen lamps and double ellipsoidal mirrors (a Nichiden machine S-15HD). An appropriate quantity (about 600 mg) of solvent was sandwiched between the polycrystalline rod and the seed crystal and melted to form a liquid zone. During the growth the rod and the seed, rotating opposite each other to stir the liquid zone, were slowly fed down at the speed of 1.0 mm/h and a single crystal was grown epitaxially on the seed. We kept the atmosphere of (0.3 MPa = 3 atm) O2... The typical single-domain crystal was column-shaped along the a axis with the size of 5 mm (diameter) x 20 mm..."
Formula: La2-xSrxCuO4
Informal Name: La:21
Chemical Family: La(Sr)-Cu-O
Chemical Class: Oxide
Structure Type: Single Crystal
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:

Resistivity (normal state) for La:21; [La(Sr)-Cu-O]
Direction () x of Srx (formula units) Temperature (K) Resistivity (normal state) (mΩ·cm)
c axis 0.10 29 610
c axis 0.10 100 380
c axis 0.10 200 320
c axis 0.10 300 290
c axis 0.10 400 300
c axis 0.10 500 310
c axis 0.10 600 330
c axis 0.10 700 340
c axis 0.10 800 350
c axis 0.12 25 170
c axis 0.12 100 140
c axis 0.12 200 150
c axis 0.12 300 160
c axis 0.12 400 170
c axis 0.12 500 190
c axis 0.12 600 210
c axis 0.12 700 229
c axis 0.12 800 249
c axis 0.15 36 70
c axis 0.15 100 70
c axis 0.15 200 70
c axis 0.15 300 80
c axis 0.15 400 99
c axis 0.15 500 110
c axis 0.15 600 130
c axis 0.15 700 150
c axis 0.15 800 160
c axis 0.20 36 20
c axis 0.20 200 40
c axis 0.20 300 50
c axis 0.20 400 60
c axis 0.20 500 80
c axis 0.20 600 90
c axis 0.20 700 110
c axis 0.20 800 107
c axis 0.30 100 10
c axis 0.30 200 10
c axis 0.30 300 20
c axis 0.30 400 20
c axis 0.30 500 30
c axis 0.30 600 30
c axis 0.30 700 50
c axis 0.30 750 50
ab plane 0.10 24 0.0
ab plane 0.10 24 0.3
ab plane 0.10 100 0.5
ab plane 0.10 200 0.8
ab plane 0.10 300 1.2
ab plane 0.10 400 1.6
ab plane 0.10 500 2.0
ab plane 0.10 600 2.3
ab plane 0.10 700 2.6
ab plane 0.10 800 2.8
ab plane 0.12 24 0.0
ab plane 0.12 24 0.2
ab plane 0.12 100 0.3
ab plane 0.12 200 0.4
ab plane 0.12 300 0.7
ab plane 0.12 400 0.9
ab plane 0.12 500 1.2
ab plane 0.12 600 1.4
ab plane 0.12 700 1.5
ab plane 0.12 800 1.7
ab plane 0.15 36 0.0
ab plane 0.15 36 0.1
ab plane 0.15 100 0.1
ab plane 0.15 200 0.3
ab plane 0.15 300 0.4
ab plane 0.15 400 0.6
ab plane 0.15 500 0.8
ab plane 0.15 600 0.9
ab plane 0.15 700 1.0
ab plane 0.15 800 1.1
ab plane 0.20 48 0.0
ab plane 0.20 100 0.1
ab plane 0.20 200 0.2
ab plane 0.20 300 0.3
ab plane 0.20 400 0.3
ab plane 0.20 500 0.4
ab plane 0.20 600 0.5
ab plane 0.20 700 0.6
ab plane 0.20 800 0.7
ab plane 0.30 60 0.0
ab plane 0.30 200 0.1
ab plane 0.30 300 0.1
ab plane 0.30 400 0.2
ab plane 0.30 500 0.3
ab plane 0.30 600 0.4
ab plane 0.30 700 0.4
ab plane 0.30 800 0.5
Measurement Method: Four-probe method
"For the transport measurements we cut the column-shaped ingot into two parallelepiped samples with a diamond blade. We prepared two samples for each x, which had nearly the same dimensions ( about 1x1x4mm3) but had different orientations of crystal axis: one had the longest dimension parallel to the c axis and the other had the one perpendicular to that... Resistivity was measured by the standard four-probe method... Dots of gold paste were fired as electrodes on the samples at 900 °C in oxygen. In the high-temperature measurement above room temperature Au lead wires were wound around the sample tightly and bonded with heat-treated Au paste."

Cautions: Evaluated Data
Digitized data were obtained from Figure 2 of the paper.
Thermoelectric Power for La:21; [La(Sr)-Cu-O]
Direction () x of Srx (formula units) Temperature (K) Thermoelectric Power (µV/K)
ab plane 0.10 30 3
ab plane 0.10 30 17
ab plane 0.10 50 38
ab plane 0.10 100 52
ab plane 0.10 150 57
ab plane 0.10 200 58
ab plane 0.10 250 55
ab plane 0.10 280 53
ab plane 0.15 34 2
ab plane 0.15 34 18
ab plane 0.15 44 30
ab plane 0.15 50 33
ab plane 0.15 100 35
ab plane 0.15 150 33
ab plane 0.15 200 28
ab plane 0.15 300 22
ab plane 0.20 30 2
ab plane 0.20 30 10
ab plane 0.20 34 17
ab plane 0.20 50 20
ab plane 0.20 100 22
ab plane 0.20 150 18
ab plane 0.20 200 15
ab plane 0.20 250 12
ab plane 0.20 300 8
ab plane 0.30 10 2
ab plane 0.30 50 5
ab plane 0.30 100 5
ab plane 0.30 150 5
ab plane 0.30 200 2
ab plane 0.30 250 0
ab plane 0.30 285 0
c axis 0.10 30 0
c axis 0.10 39 19
c axis 0.10 50 31
c axis 0.10 100 54
c axis 0.10 150 68
c axis 0.10 200 78
c axis 0.10 250 86
c axis 0.15 30 2
c axis 0.15 50 24
c axis 0.15 100 47
c axis 0.15 150 64
c axis 0.15 200 71
c axis 0.15 250 76
c axis 0.30 10 0
c axis 0.30 25 12
c axis 0.30 50 15
c axis 0.30 100 22
c axis 0.30 150 24
c axis 0.30 200 27
c axis 0.30 250 31
Measurement Method: Thermopower method
"To monitor the temperature gradient (typically 0.3 K) in the measurement of thermoelectric power, Chromel-Constantan differential thermocouples were attached. The thermoelectric power was measured across two additional copper leads."

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