Vortex matter in superconducting mesoscopic disks: Structure, magnetization, and phase transitions

J. J. Palacios

doi:10.1103/PhysRevB.58.R5948

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Vortex matter in superconducting mesoscopic disks: Structure, magnetization, and phase transitions

J. J. Palacios

DOI 10.1103/PhysRevB.58.R5948 · Physical Review B

T1

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Abstract

The dense vortex matter structure and associated magnetization are calculated for type-II superconducting mesoscopic disks. The magnetization exhibits generically first-order phase transitions as the number of vortices changes by one and presents two well-defined regimes: A nonmonotonous evolution of the magnitude of the magnetization jumps signals the presence of a vortex glass structure which is separated by a second-order phase transition at Hc2 from a condensed state of vortices (giant vortex) where the magnitude of the jumps changes monotonously. We compare our results with Hall magnetometry measurements by Geim et al. [Nature (London) 390, 259 (1997)] and claim that the magnetization exhibits clear traces of the presence of these vortex glass states.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown