Flux-creep activation energy in high-Tc superconductors
S. Salem-Sugui, Jr., Donglu Shi
DOI 10.1103/PhysRevB.46.6618 · Physical Review B
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Abstract
We investigated the relationship between the effective flux-creep activation energy U and the current density j (∼M), for both the YBa2Cu3Ox and Bi2Sr2CaCu2Ox systems. We found that the U-versus-M curves can be best fitted by a power law. More specifically, for a single crystal of Bi2Sr2CaCu2Ox at a given temperature, a logarithmic relation between U and M is found in the low-temperature region, while a power-law behavior takes place near the irreversibility line. The validity of the apparent activation energy U0 is also discussed.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3Ox Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90 | Pressure not reported | unknown |
| Bi2Sr2CaCu2Ox Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 45 | Pressure not reported | unknown |
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