Superconductivity in HxYBa2Cu3O7
J. J. Reilly, M. Suenaga, J. R. Johnson, P. Thompson, A. R. Moodenbaugh
DOI 10.1103/PhysRevB.36.5694 · Physical Review B
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Abstract
The preparation of HxYBa2Cu3O7 by the direct reaction with hydrogen gas is described. The expansion of the original orthorhombic unit cell, as determined by x-ray diffraction, indicates that the system forms a hydrogen solid solution up to x∼0.2; at higher H contents a hydrogen-rich phase is precipitated. The solid-solution phase exhibits a superconducting transition at ∼94 K, which was usually slightly higher than the original oxide. The H-rich phase(s), which are suggested to be interstitial hydrides, are not superconducting at 4 K or above. The maximum H content so far achieved corresponds to x=5.9. The H-rich phases are stable at room temperature; at elevated temperatures (> 473 K) they will decompose slowly under vacuum to form water and various solid products. They also slowly react upon exposure to room air.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90 | Pressure not reported | onset |
| H0.1YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 93.6 | Pressure not reported | onset |
| H0.5YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 94 | Pressure not reported | onset |
| H1YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 94 | Pressure not reported | onset |
| H1.7YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 95.7 | Pressure not reported | onset |
| H0.8YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 92.8 | Pressure not reported | onset |
| H2.0YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 93 | Pressure not reported | onset |
| D2.7YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 93.8 | Pressure not reported | onset |
| H1.2YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 93.8 | Pressure not reported | onset |
| H0.14YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 92.5 | Pressure not reported | onset |
| H0.48YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 93.8 | Pressure not reported | onset |
| H0.13YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 93.5 | Pressure not reported | onset |
| H0.19YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 93.5 | Pressure not reported | onset |
| H0.38YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 93.8 | Pressure not reported | onset |
| H0.58YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 94.8 | Pressure not reported | onset |
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