Material Specification for Y:123; [Y-Ba-Cu-O]
Process: Flux Growth
Notes: "The single crystals were grown by the flux technique." No additional processing details were noted.
Formula: YBa2Cu3O7-x
Informal Name: Y:123
Chemical Family: Y-Ba-Cu-O
Chemical Class: Oxide
Structure Type: Single Crystal
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:
Penetration Depth for Y:123; [Y-Ba-Cu-O]
| Penetration Depth (σ) |
| 6250 |
Measurement Method: Electron spin resonance
The authors cite B. Rakvin et al., Solid State Commun., Vol. 72, 199 (1989), and summarize the procedure as follows. "The thin, plate-like crystals were mounted directly on a quartz plate using rubber cement. The rubber cement is ESR inactive and has no influence on the ESR signal of the paramagnetic probe used for the line broadening measurements. The paramagnetic probe used was the stable free radical diphenylpicrylhydrazyl (DPPH). The probe was adsorbed by putting a small drop from a microsyringe of (about) 1 x 10
-2M solution of DPPH in acetone in the center of the flat surface (ab-plane) of the single crystal, and dried in air. The sample was finally coated with a thin layer of rubber cement to prevent sample slippage or cavity contamination. The ESR measurements were made at 9.45 GHz by mounting the crystal assembly on a Suprasil glass holder in an Oxford Instruments ESR 900 continuous flow helium cryostat at the center of a TE
102 microwave resonant cavity of a Bruker ESP 300 ESR spectrometer. The magnetic field modulation frequency was 100 kHz and the measurements were carried out with the crystal c-axis aligned parallel to the magnetic field. The DPPH line broadening with decreasing temperature was measured for (0.1 mT = 1 G) modulation amplitude at 62 mW microwave power."
Cautions: Evaluated Data
