Physics – Condensed Matter – Superconductivity
Scientific paper
2000-01-11
Phys. Rev. Lett. 85, 1528-1531 (2000)
Physics
Condensed Matter
Superconductivity
in PDF format; 12 pages including 3 pages of figures. Slightly extended version of Phys. Rev. Lett. 85, 1528-1531 (2000)
Scientific paper
10.1103/PhysRevLett.85.1528
Each time a vortex enters or exits a small superconductor, a different fluxoid state develops. We have observed splitting and sharp kinks on magnetization curves of such individual states. The features are the manifestation of first and second order transitions, respectively, and reveal the existence of distinct vortex phases within a superconducting state with a fixed number of fluxoids. We show that the kinks indicate the merger of individual vortices into a single giant vortex while the splitting is attributed to transitions between different arrays of the same number of vortices.
Dubonos S. V.
Geim Andre K.
Palacios Javier
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