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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: X-ray Single Crystal Analysis of HgBa2Ca2Cu3O8+δ and Influence of Oxygen Stoichiometry on the Superconducting Properties
Author(s): A. Bertinotti, D. Colson, J. Hammann, J.F. Marucco, D. Luzet, A. Pinatel, and V. Viallet
Publication: Physica C Volume: 250 Issue: Not Available Year: 1995 Page(s): 213-221
Editor(s): Not Available
Publisher: Elsevier Science Publishers B.V.
Language: English
Notes: Not Available
Keywords: Material Specification, Crystallography, Critical Temperature, Magnetic Susceptibility

Materials and Properties

Hg:1223; [Hg-Ba-Ca-Cu-O]
Material Specification for Hg:1223; [Hg-Ba-Ca-Cu-O] Process: Crystal Growth
Notes: "Single crystals from a post-annealed batch showing a superconductivity onset at 135 K were selected... intergrowth phases stacked along the c direction give rise to streaks visible on oscillation photographs... A sample with minimal streaking of diffracted spots was chosen with the following dimensions: 0.20(2) x 0.21(9) x 0.08(8) mm3." No additional processing details were noted.
Formula: HgBa2Ca2Cu3Ox
Informal Name: Hg:1223
Chemical Family: Hg-Ba-Ca-Cu-O
Chemical Class: Oxide
Structure Type: Single Crystal
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:

Crystallography for Hg:1223; [Hg-Ba-Ca-Cu-O]
Crystal System: Tetragonal
Formula Units per Cell:
Space Group: P4/mmm
Cell Parameters
Occupancy () Temp K a Å b Å c Å
--- 293 3.851(2) -- 15.830(7)
Atomic Coordinates
Occupancy () Atom Temp K a-axis b-axis c-axis
0.83(9) Hg 293 0.0 0.0 0.0
0.16(1) Cu 293 0.0 0.0 0.0
1.0 Ba 293 0.5 0.5 0.1752(5)
1.0 Cu(1) 293 0.0 0.0 0.5
1.0 Cu(2) 293 0.0 0.0 0.2998(4)
1.0 Ca 293 0.5 0.5 0.3980(3)
1.0 O(1) 293 0.5 0.0 0.5
1.0 O(2) 293 0.5 0.0 0.3005(2)
1.0 O(3) 293 0.0 0.0 0.1295(2)
0.190 O(4) 293 0.5 0.5 0.0
Measurement Method: X-ray diffraction
"The data of the X-ray analysis at 293 K (were) collected with an ENRAF-NONIUS CAD-4 diffractometer... Counter aperture, scan angle and crystal/counter coupling were optimized in order to avoid the overlap along the [00l] direction between neighboring reflections resulting from the presence of intergrowth phases. Reciprocal space was scanned out to θ = 40° with indices from h = -6 to +6, k = 0 to +6, l = 0 to 28. Three standard reflections were monitored every 4 h. A total number of 1602 reflections were measured, reducing to 511 independent ones."

Cautions: Evaluated Data
Critical Temperature for Hg:1223; [Hg-Ba-Ca-Cu-O]
x of Ox (formula units) Critical Temperature (K)
8.02 110
8.025 115
8.09 130
8.19 135
8.27 133.5
Measurement Method: SQUID magnetometer
The authors cite J.F. Marucco et al., J. Chim Phys. (Paris), Vol. 66, 674 (1969), and summarize the procedure as follows. "...to obtain information about the doping process, samples of Hg-1223 were submitted to various annealing treatments in an Ugine-Eyraud B 60 thermobalance. ... After each heat treatment, the evolution of the sample properties were checked by magnetic-susceptibility measurements. These were derived from DC magnetization measurements performed with a SQUID magnetometer (Cryogenic Limited S 600) in an applied field of (796 A/m = 10 Oe). Classical zero-field cooled (ZFC) and field-cooled (FC) procedures were used. For each run, the sample was first cooled down, from above the critical temperature Tc, in the residual field of the magnetometer (smaller than 0.3 µT = 3 mG). The field was applied at the lowest temperature and the ZFC magnetization was recorded as a function of increasing temperatures up to T > Tc. The sample was subsequently cooled down in the applied field and the FC measurements were taken again with increasing temperatures."

Cautions: Evaluated Data
Magnetic Susceptibility for Hg:1223; [Hg-Ba-Ca-Cu-O]
Cooling Condition () Temperature (K) Magnetic Susceptibility (arbitrary)
FC 40 -0.34
FC 55 -0.36
FC 70 -0.35
FC 86 -0.35
FC 100 -0.34
FC 111 -0.33
FC 122 -0.30
FC 130 -0.27
FC 133 -0.20
FC 133 -0.15
FC 135 0
FC 138 0
ZFC 40 -0.93
ZFC 52 -0.94
ZFC 64 -0.94
ZFC 78 -0.94
ZFC 90 -0.92
ZFC 105 -0.91
ZFC 112 -0.88
ZFC 120 -0.76
ZFC 128 -0.63
ZFC 131 -0.50
ZFC 132 -0.43
ZFC 133 -0.20
ZFC 133 -0.15
ZFC 135 0
ZFC 138 0
Measurement Method: SQUID magnetometer
The authors cite J.F. Marucco et al., J. Chim Phys. (Paris), Vol. 66, 674 (1969), and summarize the procedure as follows. "...to obtain information about the doping process, samples of Hg-1223 were submitted to various annealing treatments in an Ugine-Eyraud B 60 thermobalance. ... After each heat treatment, the evolution of the sample properties were checked by magnetic-susceptibility measurements. These were derived from DC magnetization measurements performed with a SQUID magnetometer (Cryogenic Limited S 600) in an applied field of (796 A/m = 10 Oe). Classical zero-field cooled (ZFC) and field-cooled (FC) procedures were used. For each run, the sample was first cooled down, from above the critical temperature Tc, in the residual field of the magnetometer (smaller than 0.3 µT = 3 mG). The field was applied at the lowest temperature and the ZFC magnetization was recorded as a function of increasing temperatures up to T > Tc. The sample was subsequently cooled down in the applied field and the FC measurements were taken again with increasing temperatures."

Cautions: Evaluated Data
The data are for x of Ox = 8.19 and are for "...field-cooled and zero-field cooled ground samples annealed under oxygen at 300 °C (in a field of 796 A/m (10 Oe)." Digitized data were obtained from Figure 6 of the paper.