Microstructure within domains of melt-processed YBa2Cu3O7−x superconductors
K. B. Alexander, A. Goyal, D. M. Kroeger, V. Selvamanickam, K. Salama
DOI 10.1103/PhysRevB.45.5622 · Physical Review B
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Abstract
The microstructure within single domains of melt-processed YBa2Cu3O7−x (1:2:3) material has been examined. Rather than composing a ‘‘brick-wall’’ structure, the stacked, parallel platelets within the domains are actually portions of a single crystal. A growth mechanism is proposed that is consistent with the observed microstructural features. The anisotropic nature of the growth of 1:2:3 results in gaps separating the platelets. The gaps, however, terminate within domains, resulting in interconnected single-crystalline material. The absence of weak-link behavior for current flow along the c axis and the high critical-current densities observed within domains of melt-processed 1:2:3 material are readily explained by the fact that current flow is solely through single-crystalline material.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7-x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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