Vortex-lattice melting front in thin superconductors with pinning
M. V. Indenbom, E. H. Brandt, C. J. van der Beek, M. Konczykowski
DOI 10.1103/PhysRevB.70.144525 · Physical Review B
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Abstract
Magneto-optical observations of a second flux front, which occurs at the second peak in the magnetization of Bi2Sr2CaCu2Ox single crystals related to the known first-order “vortex-lattice melting,” are reconsidered. We show that, in thin samples, electrodynamics necessarily leads to an extended region in which the magnetic induction adopts a nearly constant value close to that at which the phase transition occurs at thermal equilibrium. In this region a dynamical phase mixture of vortex “solid” and “liquid” should exist. Interestingly, the observed second flux front does not mark the “melting” front, as it was naively interpreted earlier, but indicates the disappearance of the last “solid droplets.”
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2CaCu2Ox 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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