Material Specification for Y:124; [Y-Ba-Cu(Fe)-O]
Process: Solid State Reaction
Notes: "The samples... were synthesized under high oxygen pressure. Appropriate amounts of BaCO3 and corresponding oxide powders with more than 99.9% purity were mixed thoroughly and calcined three times at 900 °C under flowing oxygen for 12 h with intermediate grinding... They were pressed into pellets and reacted at 980 °C, 1010 °C and 1040 °C for 6 h in the gas mixture of 80% Ar and 20% O2 at the pressure of 200 MPa, i.e. oxygen partial pressure of 40 MPa, by using an O2-HIP (hot isostatic pressing) apparatus made by Kobe Steel Co. Ltd."
Formula: YBa2Cu4-xFexO8
Informal Name: Y:124
Chemical Family: Y-Ba-Cu(Fe)-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:
Crystallography for Y:124; [Y-Ba-Cu(Fe)-O]
| Crystal System: | Orthorhombic |
| Formula Units per Cell: | |
| Space Group: |
|
Cell Parameters
| x (formula units) |
Temp
K
|
a
Å
|
b
Å
|
c
Å
|
| 0 |
296 |
3.8406 |
2.8724 |
27.2272 |
| 0.04 |
296 |
3.8416 |
3.8733 |
27.2214 |
| 0.08 |
296 |
3.8428 |
3.8744 |
27.1955 |
Measurement Method: X-ray diffraction
"The resulting powders were characterized by XRD and CuKα radiation. The lattice parameters were determined by a least-squares method using Ge as an internal standard." No additional measurement details were noted.
Cautions: Evaluated Data
Critical Temperature for Y:124; [Y-Ba-Cu(Fe)-O]
| x (formula units) |
Tc(magnetic) (K) |
Tc(onset) (K) |
ΔTc (K) |
Critical Temperature (K) |
| 0 |
80 |
76.9 |
3.5 |
72.7 |
| 0.04 |
64 |
64.6 |
12.0 |
49.6 |
| 0.08 |
45 |
50.4 |
24.3 |
24.1 |
Measurement Method: Tc methods
"Superconducting transitions were determined by both resistivity and magnetization; the former was measured by the standard four-probe method and the latter was obtained with a superconducting quantum interference device (SQUID) magnetometer while cooling in a field of (796 A/m = 10 Oe)." No additional measurement details were noted.
Cautions: Evaluated Data
Material Specification for Y:124; [Y-Ba-Cu(Co)-O]
Process: Solid State Reaction
Notes: "The samples... were synthesized under high oxygen pressure. Appropriate amounts of BaCO3 and corresponding oxide powders with more than 99.9% purity were mixed thoroughly and calcined three times at 900 °C under flowing oxygen for 12 h with intermediate grinding... They were pressed into pellets and reacted at 980 °C, 1010 °C and 1040 °C for 6 h in the gas mixture of 80% Ar and 20% O2 at the pressure of 200 MPa, i.e. oxygen partial pressure of 40 MPa, by using an O2-HIP (hot isostatic pressing) apparatus made by Kobe Steel Co. Ltd."
Formula: YBa2Cu4-xCoxO8
Informal Name: Y:124
Chemical Family: Y-Ba-Cu(Co)-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:
Crystallography for Y:124; [Y-Ba-Cu(Co)-O]
| Crystal System: | Orthorhombic |
| Formula Units per Cell: | |
| Space Group: |
|
Cell Parameters
| x (formula units) |
Temp
K
|
a
Å
|
b
Å
|
c
Å
|
| 0 |
296 |
3.8406 |
2.8724 |
27.2272 |
| 0.04 |
296 |
3.8419 |
3.8727 |
27.2268 |
| 0.08 |
296 |
3.8423 |
3.8733 |
27.2136 |
Measurement Method: X-ray diffraction
"The resulting powders were characterized by XRD and CuKα radiation. The lattice parameters were determined by a least-squares method using Ge as an internal standard." No additional measurement details were noted.
Cautions: Evaluated Data
Critical Temperature for Y:124; [Y-Ba-Cu(Co)-O]
| x (formula units) |
Tc(magnetic) (K) |
Tc(onset) (K) |
ΔTc (K) |
Critical Temperature (K) |
| 0 |
80 |
76.9 |
3.5 |
72.7 |
| 0.04 |
64 |
64.0 |
3.0 |
61.0 |
| 0.08 |
50 |
53.7 |
5.0 |
47.5 |
Measurement Method: Tc methods
"Superconducting transitions were determined by both resistivity and magnetization; the former was measured by the standard four-probe method and the latter was obtained with a superconducting quantum interference device (SQUID) magnetometer while cooling in a field of (796 A/m = 10 Oe)." No additional measurement details were noted.
Cautions: Evaluated Data
