Material Specification for Hg:1212; [Hg-Ba-Ca-Cu-O]
Process: Laser Ablation
Notes: The authors cite C.C. Tsuel et al., Science, Vol. 263, 1259-1261 (1994), and summarize the procedure as follows. "The sequential layers of HgO and the copper oxide precursor Ba2CaCu2Ox were deposited from two separate targets by a pulsed laser technique. The films were deposited at room temperature in vacuo on (100)-oriented SrTiO3 substrates. In this study we used 0.25 µm thick films which were covered by a protective layer of HgO (400 σ thick). The films were then annealed at 800 °C for 1 h in sealed quartz tubes together with appropriate amounts of bulk stoichiometric mercury copper oxide and pellets of the precursor."
Formula: HgBa2CaCu2O6+x
Informal Name: Hg:1212
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:1212; [Hg-Ba-Ca-Cu-O]
| Critical Temperature (K) |
| 120 |
Measurement Method: SQUID magnetometer
The authors cite A.M. Campbell et al., Adv. Phys., Vol. 21, 199-429 (1972), and summarize the procedure as follows. "The persistent current density was obtained from the width of direct current magnetic hysteresis ΔM = Δm/V using the critical-state method, which relates ΔM to J via a geometrical factor. Here, m = m(H,T), where H is magnetic field strength and T is temperature, is the magnetic moment we measure with a superconducting quantum interference device magnetometer and V is the volume, of the superconductor... the currents in the ab-plane and H parallel to the c-axis (were determined). ... Irreversibility lines... were obtained from the closing of the hysteresis loops m(H)..."
Cautions: Evaluated Data
Critical Current Density for Hg:1212; [Hg-Ba-Ca-Cu-O]
| Magnetic Field (T) |
Temperature (K) |
Critical Current Density (kA/cm2) |
| 0.005 |
4 |
10000 |
| 0.005 |
9 |
8000 |
| 0.005 |
19 |
7200 |
| 0.005 |
40 |
5100 |
| 0.005 |
55 |
3000 |
| 0.005 |
69 |
1600 |
| 0.005 |
76 |
1400 |
| 0.005 |
85 |
760 |
| 0.005 |
90 |
620 |
| 0.005 |
105 |
180 |
| 0.005 |
115 |
17 |
| 0.005 |
118 |
1.3 |
| 0.1 |
5 |
7300 |
| 0.1 |
19 |
2900 |
| 0.1 |
40 |
900 |
| 0.1 |
60 |
210 |
| 0.1 |
65 |
140 |
| 0.1 |
70 |
150 |
| 0.1 |
77 |
81 |
| 0.1 |
81 |
99 |
| 0.1 |
85 |
73 |
| 0.1 |
91 |
29 |
| 0.1 |
94 |
21 |
| 0.1 |
101 |
19 |
| 0.1 |
105 |
14 |
| 0.1 |
110 |
4.9 |
| 0.1 |
118 |
0.77 |
| 1.5 |
5 |
1400 |
| 1.5 |
9 |
690 |
| 1.5 |
20 |
65 |
| 1.5 |
30 |
17 |
| 1.5 |
40 |
2.4 |
| 1.5 |
50 |
2.6 |
| 1.5 |
55 |
1.3 |
| 1.5 |
59 |
0.76 |
Measurement Method: SQUID magnetometer
The authors cite A.M. Campbell et al., Adv. Phys., Vol. 21, 199-429 (1972), and summarize the procedure as follows. "The persistent current density was obtained from the width of direct current magnetic hysteresis ΔM = Δm/V using the critical-state method, which relates ΔM to J via a geometrical factor. Here, m = m(H,T), where H is magnetic field strength and T is temperature, is the magnetic moment we measure with a superconducting quantum interference device magnetometer and V is the volume, of the superconductor... the currents in the ab-plane and H parallel to the c-axis (were determined). ... Irreversibility lines... were obtained from the closing of the hysteresis loops m(H)..."
Cautions: Evaluated Data
Digitized data were obtained from Figure 2 of the paper.
Irreversibility Field for Hg:1212; [Hg-Ba-Ca-Cu-O]
| Angle(c,H) (degrees) |
Temperature (K) |
Irreversibility Field (T) |
| 0 |
8.7 |
5.5 |
| 0 |
9.5 |
4.5 |
| 0 |
11 |
4.1 |
| 0 |
13 |
3.5 |
| 0 |
15 |
3.3 |
| 0 |
19 |
3.2 |
| 0 |
17 |
2.9 |
| 0 |
19 |
2.5 |
| 0 |
23 |
2.2 |
| 0 |
28 |
1.8 |
| 0 |
29 |
1.1 |
| 0 |
41 |
0.63 |
| 0 |
50 |
0.42 |
| 0 |
60 |
0.37 |
| 0 |
65 |
0.22 |
| 0 |
70 |
0.27 |
| 0 |
75 |
0.31 |
| 0 |
77 |
0.21 |
| 0 |
80 |
0.31 |
| 0 |
82 |
0.21 |
| 0 |
84 |
0.26 |
| 0 |
95 |
0.21 |
| 0 |
100 |
0.11 |
| 0 |
104 |
0.053 |
| 0 |
109 |
0.051 |
| 0 |
115 |
0.049 |
| 90 |
65 |
5.5 |
| 90 |
70 |
3.2 |
| 90 |
77 |
1.8 |
| 90 |
80 |
1.3 |
| 90 |
82 |
1.2 |
| 90 |
84 |
1.0 |
| 90 |
90 |
0.65 |
| 90 |
95 |
0.50 |
| 90 |
100 |
0.20 |
| 90 |
105 |
0.10 |
| 90 |
114 |
0.00 |
Measurement Method: SQUID magnetometer
The authors cite A.M. Campbell et al., Adv. Phys., Vol. 21, 199-429 (1972), and summarize the procedure as follows. "The persistent current density was obtained from the width of direct current magnetic hysteresis ΔM = Δm/V using the critical-state method, which relates ΔM to J via a geometrical factor. Here, m = m(H,T), where H is magnetic field strength and T is temperature, is the magnetic moment we measure with a superconducting quantum interference device magnetometer and V is the volume, of the superconductor... the currents in the ab-plane and H parallel to the c-axis (were determined). ... Irreversibility lines... were obtained from the closing of the hysteresis loops m(H)..."
Cautions: Evaluated Data
Angle(c,H) is the angle between the c-axis and the magnetic field.
Digitized data were obtained from Figure 3 of the paper.
