Material Specification for Y:123; [Y-Ba-Cu-O]
Process: Solid State Reaction
Notes: The authors cite S. Rusiecki et al., Proceedings of th E-MRS Spring Conference, Strasbourg, 1990 (Elsevier, Amersterdam), and summarize the procedure as follows. "... experiments were performed on two sintered nearly "equilibrium" samples... which were prepared at the Eidgenossische Technische Hochschule (ETH) Zurich. No zirconium gettering or quenching have been used because they lead to more or less nonequilibrium samples. Instead, it was tried to come as near as possible to the thermodynamic equilibrium using long times for the solid-state reaction at 950 °C and slow cooling to room temperature. The results for both samples are essentialy consistent, so that only those for x=6.970(1) will be presented in detail."
Formula: YBa2Cu3O6.97
Informal Name: Y:123
Chemical Family: Y-Ba-Cu-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name:
Production Date:
Lot Number:
Production Form:
Density (mass) for Y:123; [Y-Ba-Cu-O]
Measurement Method: Unknown density method
Cautions: Unevaluated Data
No measurement details were noted.
Critical Temperature for Y:123; [Y-Ba-Cu-O]
| Critical Temperature (K) |
| 89.5 |
Measurement Method: SQUID magnetometer
"Magnetic susceptibility (was) measured with a SQUID susceptometer as a function of temperature in a field of 1.42 mT (after field cooling, FC)... The disk-shaped sample had a diameter of 14.5 mm and thickness of 3.5 mm... The external field was applied perpendicular to the plane of the disk..."
Cautions: Evaluated Data
Magnetic Susceptibility for Y:123; [Y-Ba-Cu-O]
| Temperature (K) |
Magnetic Susceptibility (arbitrary) |
| 5.3 |
-0.6 |
| 25.2 |
-0.6 |
| 46.4 |
-0.6 |
| 71.6 |
-0.6 |
| 80.2 |
-0.6 |
| 85.9 |
-0.4 |
| 87.9 |
-0.2 |
| 91.0 |
0.0 |
| 95.0 |
0.0 |
Measurement Method: SQUID magnetometer
"Magnetic susceptibility (was) measured with a SQUID susceptometer as a function of temperature in a field of 1.42 mT (after field cooling, FC)... The disk-shaped sample had a diameter of 14.5 mm and thickness of 3.5 mm... The external field was applied perpendicular to the plane of the disk..."
Cautions: Evaluated Data
Digitized data were obtained from Figure 1 of the paper.
Penetration Depth for Y:123; [Y-Ba-Cu-O]
| Temperature (K) |
Penetration Depth (σ) |
| 9 |
1500 |
| 17 |
1500 |
| 32 |
1600 |
| 48 |
1600 |
| 65 |
1800 |
| 77 |
2400 |
| 86 |
3700 |
| 87 |
4600 |
| 89 |
6400 |
Measurement Method: Muon-spin rotation
"The experiments presented in this work were performed in the ¦M3 area of the Paul Scherrer Institute (PSI, Switerland) using low-momentum muons (29 MeV/c). A helium-flow cryostat allowed a temperature range between 8 and 300 K, with a stability of ±0.1 K. A Helmholtz coil was used to apply external magnetic fields up to 380 mT... A spin rotator was used to reduce the correlated background to a minimum. With this experimental setup the external field was applied parallel to the muon momentum, focusing the particles on the sample. Although the samples had diameters between 14.5 mm and 25 mm, the beam was collimated to a diameter of only 8 mm in order to keep the correlated background as low as possible. In addition, the samples were mounted on a hematite (Fe
2O
3) target holder... To minimize the number of muons stopping somewhere in the beam line (muon counter, cryostat windows, etc), the range of the material between the production target and the sample was reduced to about 60 mg/cm
2. With all these precautions only 5(1)% of the detected muons contributed to a correlated background signal. With the density of the samples being of the order of 5.3 g/cm
3, the low-momentum muons (range 150 mg/cm
2) stopped in a depth of approximately 280 µm... an effective penetration depth... can be defined by means of... the second moment of the µSR frequency spectrum... a FC temperature scan was performed in a magnetic field of 350 mT."
Cautions: Evaluated Data
Digitized data were obtained from Figure 4 of the paper.
