Dilation of the giant vortex state in a mesoscopic superconducting loop
S. Pedersen, G. R. Kofod, J. C. Hollingbery, C. B. Sørensen, P. E. Lindelof
DOI 10.1103/PhysRevB.64.104522 · Physical Review B
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Abstract
We have experimentally investigated the magnetization of a mesoscopic aluminum loop at temperatures well below the superconducting transition temperature Tc. The flux quantization of the superconducting loop was investigated with a μ-Hall magnetometer in magnetic field intensities between ±100 G. The magnetic field intensity periodicity observed in the magnetization measurements is expected to take integer values of the superconducting flux quanta Φ0=h/2e. A closer inspection of the periodicity, however, reveals a subflux quantum shift. This fine structure we interpret as a consequence of a so-called giant vortex state nucleating towards either the inner or the outer side of the loop. These findings are in agreement with recent theoretical reports.
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. | 1.2 | Pressure not reported | onset |
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