Flux jumps in hot-isostatic-pressed bulk MgB2 superconductors: Experiment and theory
C. Romero-Salazar, F. Morales, R. Escudero, A. Durán, O. A. Hernández-Flores
DOI 10.1103/PhysRevB.76.104521 · Physical Review B
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Abstract
An experimental and theoretical study of flux jumps in magnetization curves of a highly dense polycrystalline MgB2 superconductor was performed. The local temperature increments in the vortex phase were modeled. For the theoretical analysis, a critical-state model was employed which considers Joule’s heat dissipation due to temporal evolution of the magnetic induction. We used an adiabatic approximation to define an instability criterion on the shielding field with the Maxwell equations coupled to the thermal diffusion equation. Comparing experimental and theoretical magnetization loops, we found that the flux jump occurrence depends on the flux jump size.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| MgB2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 39 | Pressure not reported | unknown |
| YBa2Cu3O7-d Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Bi2Sr2CaCu2O8+d Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| MgB2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| MgB2 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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