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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: The Irreversibility Line of the Superconducting Compound HgBa2Ca3Cu4O10+δ
Author(s): P. Estrela, C. Abilio, M. Godinho, J.L. Tholence, and J.J. Capponi
Publication: Physica C Volume: 235 Issue: Not Available Year: 1994 Page(s): 2731-2732
Editor(s): Not Available
Publisher: Elsevier Science Publishers B.V.
Language: English
Notes: Vol. 235-240, multiple volume issue
Keywords: Material Specification, Critical Temperature, Critical Current Density, Irreversibility Field

Materials and Properties

Hg:1234; [Hg-Ba-Ca-Cu-O]
Material Specification for Hg:1234; [Hg-Ba-Ca-Cu-O] Process: Solid State Reaction
Notes: The authors cite E.V. Antipov et al., Physica C, Vol. 215, 1-10 (1993), and summarize the procedure as follows. "The HgBa2Ca3Cu4O10-δ (Hg-1234) superconducting compound was studied... The Hg-1234 compound is the fourth member of the Hg based homologous series HgBa2Can-1CunO2n+2+δ containing essentially four CuO2 layers separated by the Ca2+ cations." No additional processing details were noted.
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:

Critical Temperature for Hg:1234; [Hg-Ba-Ca-Cu-O]
Critical Temperature (K)
124
Measurement Method: SQUID magnetometer
"...magnetization measurments (were made) using a SQUID magnetometer. ... The magnetic behavior was analysed either by means of ZFC/FC curves (with constant applied magnetic field) or by usual hysteresis curves. From the ZFC measurements the ...Tc onset (was determined)... The irreversibility line, which separates the dissipative region from the flux pinned region in the (H,T) diagram, has been obtained by determination of the irreversibility fields and temperatures in the hysteresis and ZFC/FC curves, respectively. ... The field dependence of the critical current density, at various temperatures above 40 K, was obtained from the hysteresis cycles, for fields up to 2 T."

Cautions: Evaluated Data
Critical Current Density for Hg:1234; [Hg-Ba-Ca-Cu-O]
Temperature (K) Magnetic Field (T) Critical Current Density (kA/cm2)
40 0.09 99.2
40 0.2 55.9
40 0.3 37.0
40 0.4 27.5
40 0.5 21.2
40 0.7 14.0
40 0.8 14.0
40 0.9 12.4
40 1.1 9.2
40 1.3 6.8
40 1.4 4.4
40 1.5 5.2
40 1.6 2.0
40 1.7 4.4
40 1.8 2.8
40 1.9 2.8
40 2.0 2.0
50 0.05 68.5
50 0.10 40.1
50 0.15 27.5
50 0.24 17.3
50 0.51 10.1
50 0.75 6.9
50 1.0 3.0
50 1.2 2.9
50 1.5 2.9
50 1.6 0.5
50 1.7 1.3
50 1.9 2.0
50 2.0 0.4
60 0.10 19.7
60 0.21 8.6
60 0.30 4.7
60 0.40 3.9
60 0.61 2.2
60 0.80 0.63
60 1.0 0.59
60 1.2 0.56
60 1.3 0.54
70 0.11 7.9
70 0.16 3.9
70 0.27 1.5
70 0.42 0.71
70 0.58 0.68
Measurement Method: SQUID magnetometer
"...magnetization measurments (were made) using a SQUID magnetometer. ... The magnetic behavior was analysed either by means of ZFC/FC curves (with constant applied magnetic field) or by usual hysteresis curves. From the ZFC measurements the ...Tc onset (was determined)... The irreversibility line, which separates the dissipative region from the flux pinned region in the (H,T) diagram, has been obtained by determination of the irreversibility fields and temperatures in the hysteresis and ZFC/FC curves, respectively. ... The field dependence of the critical current density, at various temperatures above 40 K, was obtained from the hysteresis cycles, for fields up to 2 T."

Cautions: Evaluated Data
Digitized data were obtained from Figure 2 of the paper.
Irreversibility Field for Hg:1234; [Hg-Ba-Ca-Cu-O]
Temperature (K) Irreversibility Field (T)
36 5.0
39 3.9
39 3.5
42 3.0
45 2.3
48 1.9
49 2.2
54 1.4
59 1.2
65 0.9
70 0.5
76 0.2
88 0.16
90 0.11
90 0.03
99 0.03
110 0.06
130 0.02
Measurement Method: SQUID magnetometer
"...magnetization measurments (were made) using a SQUID magnetometer. ... The magnetic behavior was analysed either by means of ZFC/FC curves (with constant applied magnetic field) or by usual hysteresis curves. From the ZFC measurements the ...Tc onset (was determined)... The irreversibility line, which separates the dissipative region from the flux pinned region in the (H,T) diagram, has been obtained by determination of the irreversibility fields and temperatures in the hysteresis and ZFC/FC curves, respectively. ... The field dependence of the critical current density, at various temperatures above 40 K, was obtained from the hysteresis cycles, for fields up to 2 T."

Cautions: Evaluated Data
Digitized data were obtained from Figure 1 of the paper.