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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: Irreversibility Line and Critical Current of Superconducting HgBa2Can-1CunO2n+2+δ (n=3,4 and 5)
Author(s): O. Laborde, J.L. Tholence, J. Voiron, M. Saint-Paul, B. Sauletie, and J.J. Capponi
Publication: Physica C Volume: 235 Issue: Not Available Year: 1994 Page(s): 2717-2718
Editor(s): Not Available
Publisher: Elsevier Science Publishers B.V.
Language: English
Notes: Vol. 235-240, multiple volume issue
Keywords: Material Specification, Critical Current Density, Irreversibility Field, Sound Velocity

Materials and Properties

Hg:1223; [Hg-Ba-Ca-Cu-O]
Hg:1234; [Hg-Ba-Ca-Cu-O]
Hg:1245; [Hg-Ba-Ca-Cu-O]
Material Specification for Hg:1223; [Hg-Ba-Ca-Cu-O] Process: Solid State Reaction
Notes: The authors cite A. Schilling et al., Nature, Vol. 363, 56-58 (1993), and summarize the procedure as follows. "We report the irreversibility lines and critical current densities of sintered compounds of the series HgBa2Can-1CunO2n+2+δ with n = 3, 4 and 5."
Formula: HgBa2Ca2Cu3O8+x
Informal Name: Hg:1223
Chemical Family: Hg-Ba-Ca-Cu-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:

Critical Current Density for Hg:1223; [Hg-Ba-Ca-Cu-O]
Temperature (K) Magnetic Field (T) Critical Current Density (kA/cm2)
4.2 2.1 470
4.2 3.0 410
4.2 5.0 320
4.2 8.0 220
4.2 10.1 170
4.2 12.0 150
4.2 13.0 130
10 2.0 250
10 3.0 220
10 4.9 160
10 8.0 87
10 12.0 43
10 13.0 38
20 1.0 210
20 2.0 150
20 2.9 110
20 5.0 55
20 8.0 20
20 10.0 12
30 0.4 170
30 1.0 140
30 2.0 80
30 2.9 47
30 5.0 20
30 8.0 4.3
30 9.9 1.6
40 1.0 74
40 2.0 35
40 3.0 15
40 5.0 1.8
50 0.4 92
50 1.0 40
50 2.3 8.2
50 3.0 4.8
Measurement Method: Magnetization measurements
"The magnetization of Hg-1223 has been measured in a magnetometer using the extraction method, where the sample is moved from one to the other of the pick-up coils. ... From the hysteresis cycles one can deduce the critical current density... The (intragrain) Jc, can be estimated taking an average grain size of 10 µm, observed by electronic microscopy..."

Cautions: Evaluated Data
"Although the absolute Jc values is not accurate (due to the uncertainty on the grain size) the main conclusions about its field and temperature dependence must remain correct." Digitized data were obtained from Figure 2 of the paper.
Irreversibility Field for Hg:1223; [Hg-Ba-Ca-Cu-O]
Temperature (K) Irreversibility Field (T)
80 7.9
90 4.8
104 1.7
113 0.6
121 0.3
125 0
Measurement Method: Magnetization measurements
"The magnetization of Hg-1223 has been measured in a magnetometer using the extraction method, where the sample is moved from one to the other of the pick-up coils. ... From the hysteresis cycles one can deduce the critical current density... The (intragrain) Jc, can be estimated taking an average grain size of 10 µm, observed by electronic microscopy..."

Cautions: Evaluated Data
Digitized data were obtained from Figure 4 of the paper.
Sound Velocity for Hg:1223; [Hg-Ba-Ca-Cu-O]
Mode () Sound Velocity (km/s)
Longitudinal 3.2
Measurement Method: Ultrasonic pulse-echo
"The longitudinal sound velocity was measured with standard pulsed technique at 15 MHz." No additional measurement details were noted.

Cautions: Unevaluated Data
Material Specification for Hg:1234; [Hg-Ba-Ca-Cu-O] Process: Solid State Reaction
Notes: The authors cite A. Schilling et al., Nature, Vol. 363, 56-58 (1993), and summarize the procedure as follows. "We report the irreversibility lines and critical current densities of sintered compounds of the series HgBa2Can-1CunO2n+2+δ with n = 3, 4 and 5."
Formula: HgBa2Ca3Cu4O10+x
Informal Name: Hg:1234
Chemical Family: Hg-Ba-Ca-Cu-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:

Irreversibility Field for Hg:1234; [Hg-Ba-Ca-Cu-O]
Temperature (K) Irreversibility Field (T)
29 20.0
39 12.4
46 7.6
48 6.0
58 2.8
70 0.8
78 0.3
83 0.3
Measurement Method: Magnetization measurements
"The magnetization of Hg-1223 has been measured in a magnetometer using the extraction method, where the sample is moved from one to the other of the pick-up coils. ... From the hysteresis cycles one can deduce the critical current density... The (intragrain) Jc, can be estimated taking an average grain size of 10 µm, observed by electronic microscopy..."

Cautions: Evaluated Data
Digitized data were obtained from Figure 4 of the paper.
Material Specification for Hg:1245; [Hg-Ba-Ca-Cu-O] Process: Solid State Reaction
Notes: The authors cite A. Schilling et al., Nature, Vol. 363, 56-58 (1993), and summarize the procedure as follows. "We report the irreversibility lines and critical current densities of sintered compounds of the series HgBa2Can-1CunO2n+2+δ with n = 3, 4 and 5."
Formula: HgBa2Ca4Cu5O12+x
Informal Name: Hg:1245
Chemical Family: Hg-Ba-Ca-Cu-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:

Irreversibility Field for Hg:1245; [Hg-Ba-Ca-Cu-O]
Temperature (K) Irreversibility Field (T)
32 20.2
41 12.9
49 7.9
55 4.2
63 2.8
70 1.4
77 0.6
Measurement Method: Magnetization measurements
"The magnetization of Hg-1223 has been measured in a magnetometer using the extraction method, where the sample is moved from one to the other of the pick-up coils. ... From the hysteresis cycles one can deduce the critical current density... The (intragrain) Jc, can be estimated taking an average grain size of 10 µm, observed by electronic microscopy..."

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