Material Specification for Ba:11; [Ba(K)-Bi-O]
Process: Melt Processed
Notes: The authors cite D.G. Hinks et al., Appl. Phys. Lett., Vol. 54, 1585 (1989), and summarize the procedure as follows. "... a melt-cast polycrystalline sample of Ba0.65K0.35BiO3 (was) synthesized by a novel technique..." No additional processing details were noted.
Formula: Ba0.65K0.35BiO3
Informal Name: Ba:11
Chemical Family: Ba(K)-Bi-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:
Critical Flux Density Hc2 for Ba:11; [Ba(K)-Bi-O]
Temperature (K) |
Crit.Mag.Flux Density Hc2 (T) |
16.0 |
9.1 |
18.3 |
7.0 |
20.9 |
5.0 |
23.3 |
3.0 |
26.3 |
1.5 |
28.1 |
0.6 |
29.9 |
0.1 |
30.0 |
0.0 |
Measurement Method: Four-probe method
"ac resistivity was measured with the standard four-probe technique. Leads were attached to the sample with phosphor bronze positive pressure contact wires and silver paint. ac transverse magnetoresistance was measured in fields up to 8 T at temperatures down to 4 K with a measuring current of 0.1 mA at 17 Hz... the upper-critical-field phase diagram (was) obtained from both the magnetic and resistive measurements... Previous experiments in fields up to 8 T have not shown the concave downward behavior that is expected in H
on the basis of WHH formalism. Therefore, a linear extrapolation consistent with the Ginzburg-Landau theory may be more appropriate. The corresponding critical field is H
(0)=22.7 T which we used for all of the following calculations." The authors indicated that the coherence length was estimated from the relation H
(0) = Φ0/2¦L2 where Φ0 is the flux quantum and L is the coherence length.
Cautions: Evaluated Data
Digitized data were obtained from Figure 4 of the paper.
Resistivity (normal state) for Ba:11; [Ba(K)-Bi-O]
Magnetic Field (T) |
Temperature (K) |
Resistivity (normal state) (mΩ·cm) |
0 |
5.0 |
0 |
0 |
24.9 |
0 |
0 |
29.6 |
1 |
0 |
29.9 |
3 |
0 |
30.3 |
36 |
0 |
30.9 |
53 |
0 |
34.9 |
53 |
1 |
5.0 |
0 |
1 |
24.5 |
1 |
1 |
26.8 |
13 |
1 |
27.1 |
27 |
1 |
27.5 |
41 |
1 |
28.0 |
53 |
1 |
34.9 |
54 |
2 |
5.0 |
0 |
2 |
10.0 |
0 |
2 |
15.3 |
1 |
2 |
21.3 |
1 |
2 |
24.6 |
13 |
2 |
25.6 |
29 |
2 |
26.4 |
51 |
2 |
27.1 |
53 |
2 |
35.2 |
53 |
3 |
5.0 |
0 |
3 |
10.4 |
0 |
3 |
15.3 |
1 |
3 |
18.2 |
1 |
3 |
21.9 |
8 |
3 |
23.3 |
25 |
3 |
24.6 |
46 |
3 |
25.5 |
53 |
3 |
30.4 |
54 |
3 |
35.2 |
54 |
4 |
10.0 |
0 |
4 |
15.1 |
1 |
4 |
18.4 |
4 |
4 |
21.7 |
18 |
4 |
22.5 |
38 |
4 |
23.3 |
50 |
4 |
24.4 |
53 |
4 |
28.4 |
53 |
4 |
35.2 |
54 |
5 |
5.0 |
0 |
5 |
10.4 |
1 |
5 |
13.3 |
1 |
5 |
18.5 |
9 |
5 |
21.1 |
30 |
5 |
21.9 |
46 |
5 |
22.8 |
53 |
5 |
27.3 |
54 |
5 |
35.2 |
54 |
6 |
5.0 |
0 |
6 |
10.6 |
1 |
6 |
15.6 |
8 |
6 |
18.6 |
19 |
6 |
19.8 |
39 |
6 |
21.7 |
52 |
6 |
23.5 |
53 |
6 |
27.8 |
54 |
6 |
35.2 |
54 |
7 |
5.0 |
0 |
7 |
9.7 |
1 |
7 |
15.4 |
12 |
7 |
18.1 |
22 |
7 |
18.9 |
44 |
7 |
21.5 |
53 |
7 |
26.9 |
53 |
7 |
35.2 |
54 |
8 |
6.6 |
1 |
8 |
9.5 |
3 |
8 |
14.0 |
12 |
8 |
17.5 |
30 |
8 |
18.5 |
45 |
8 |
19.0 |
52 |
8 |
20.6 |
53 |
8 |
27.1 |
54 |
8 |
35.2 |
54 |
Measurement Method: Four-probe method
"ac resistivity was measured with the standard four-probe technique. Leads were attached to the sample with phosphor bronze positive pressure contact wires and silver paint. ac transverse magnetoresistance was measured in fields up to 8 T at temperatures down to 4 K with a measuring current of 0.1 mA at 17 Hz... the upper-critical-field phase diagram (was) obtained from both the magnetic and resistive measurements... Previous experiments in fields up to 8 T have not shown the concave downward behavior that is expected in H
on the basis of WHH formalism. Therefore, a linear extrapolation consistent with the Ginzburg-Landau theory may be more appropriate. The corresponding critical field is H
(0)=22.7 T which we used for all of the following calculations." The authors indicated that the coherence length was estimated from the relation H
(0) = Φ0/2¦L2 where Φ0 is the flux quantum and L is the coherence length.
Cautions: Evaluated Data
Digitized data were obtained from Figure 2 of the paper.
Magnetic Susceptibility for Ba:11; [Ba(K)-Bi-O]
Magnetic Field (T) |
Temperature (K) |
Magnetic Susceptibility (arbitrary) |
1 |
24.5 |
-0.22 |
1 |
25.5 |
-0.14 |
1 |
26.6 |
-0.07 |
1 |
27.0 |
-0.04 |
1 |
27.4 |
-0.02 |
1 |
27.9 |
-0.01 |
1 |
31.0 |
-0.01 |
1 |
35.0 |
-0.01 |
2 |
22.1 |
-0.12 |
2 |
23.6 |
-0.07 |
2 |
24.9 |
-0.03 |
2 |
25.3 |
-0.02 |
2 |
26.0 |
-0.02 |
2 |
27.0 |
-0.02 |
2 |
30.5 |
-0.02 |
2 |
34.9 |
-0.02 |
3 |
20.2 |
-0.08 |
3 |
22.1 |
-0.05 |
3 |
23.5 |
-0.03 |
3 |
24.1 |
-0.02 |
3 |
24.6 |
-0.02 |
3 |
25.5 |
-0.02 |
3 |
29.0 |
-0.02 |
3 |
32.0 |
-0.02 |
3 |
35.0 |
-0.02 |
4 |
18.1 |
-0.06 |
4 |
20.1 |
-0.04 |
4 |
21.5 |
-0.03 |
4 |
22.5 |
-0.02 |
4 |
24.1 |
-0.02 |
4 |
28.5 |
-0.02 |
4 |
32.5 |
-0.02 |
4 |
35.0 |
-0.02 |
5 |
16.5 |
-0.05 |
5 |
19.0 |
-0.03 |
5 |
21.6 |
-0.02 |
5 |
22.5 |
-0.02 |
5 |
26.0 |
-0.02 |
5 |
30.0 |
-0.02 |
5 |
35.0 |
-0.02 |
Measurement Method: SQUID magnetometer
"Magnetic measurements were performed in a custom-built superconducting quantum interference device (SQUID) magnetometer designed for very low fields and in a commerical Quantum Design SQUID magnetometer for high fields up to 5 T... H
may be determined from the low-field regime of the magnetization curve where M(H) first deviates from linearity."
Cautions: Evaluated Data
Digitized data were obtained from Figure 3 of the paper.
Penetration Depth for Ba:11; [Ba(K)-Bi-O]
Temperature (K) |
Penetration Depth (σ) |
0 |
2200 |
Measurement Method: Four-probe method
"ac resistivity was measured with the standard four-probe technique. Leads were attached to the sample with phosphor bronze positive pressure contact wires and silver paint. ac transverse magnetoresistance was measured in fields up to 8 T at temperatures down to 4 K with a measuring current of 0.1 mA at 17 Hz... the upper-critical-field phase diagram (was) obtained from both the magnetic and resistive measurements... Previous experiments in fields up to 8 T have not shown the concave downward behavior that is expected in H
on the basis of WHH formalism. Therefore, a linear extrapolation consistent with the Ginzburg-Landau theory may be more appropriate. The corresponding critical field is H
(0)=22.7 T which we used for all of the following calculations." The authors indicated that the coherence length was estimated from the relation H
(0) = Φ0/2¦L2 where Φ0 is the flux quantum and L is the coherence length.
Cautions: Evaluated Data
Coherence Length for Ba:11; [Ba(K)-Bi-O]
Temperature (K) |
Coherence Length (σ) |
0 |
36.8 |
Measurement Method: Four-probe method
"ac resistivity was measured with the standard four-probe technique. Leads were attached to the sample with phosphor bronze positive pressure contact wires and silver paint. ac transverse magnetoresistance was measured in fields up to 8 T at temperatures down to 4 K with a measuring current of 0.1 mA at 17 Hz... the upper-critical-field phase diagram (was) obtained from both the magnetic and resistive measurements... Previous experiments in fields up to 8 T have not shown the concave downward behavior that is expected in H
on the basis of WHH formalism. Therefore, a linear extrapolation consistent with the Ginzburg-Landau theory may be more appropriate. The corresponding critical field is H
(0)=22.7 T which we used for all of the following calculations." The authors indicated that the coherence length was estimated from the relation H
(0) = Φ0/2¦L2 where Φ0 is the flux quantum and L is the coherence length.
Cautions: Evaluated Data
Critical Flux Density Hc1 for Ba:11; [Ba(K)-Bi-O]
Temperature (K) |
Crit.Mag.Flux Density Hc1 (mT) |
20 |
3.5 |
Measurement Method: SQUID magnetometer
"Magnetic measurements were performed in a custom-built superconducting quantum interference device (SQUID) magnetometer designed for very low fields and in a commerical Quantum Design SQUID magnetometer for high fields up to 5 T... H
may be determined from the low-field regime of the magnetization curve where M(H) first deviates from linearity."
Cautions: Evaluated Data