| Issue |
Europhys. Lett.
Volume 36, Number 6, November III 1996
|
|
|---|---|---|
| Page(s) | 449 - 454 | |
| Section | Condensed matter: electronic structure, electrical, magnetic and optical properties | |
| DOI | https://doi.org/10.1209/epl/i1996-00250-2 | |
| Published online | 01 September 2002 | |
Fluxoid quantization effects in superconducting mesoscopic Al multiloop structures
Laboratorium voor Vaste-Stoffysica en Magnetisme, Katholieke Universiteit Leuven,
Celestijnenlaan 200D, B-3001 Leuven, Belgium
Received:
5
August
1996
Accepted:
10
October
1996
We have studied fluxoid quantization effects in mesoscopic Al samples
consisting of a small number of square loops. In short microladders a pronounced substructure of
the Little-Parks oscillations (i.e. the oscillations of the critical temperature Tc as
a function of the applied magnetic flux 
) has been found.
These new features in 
originate from
transitions between different quantum states, each having a specific
order parameter profile and flow pattern of the supercurrents. The
experimental data are in excellent agreement with the 
calculated within the de Gennes-Alexander model for
superconducting micronetworks.
PACS: 73.23.-b – Mesoscopic systems / 74.25.Dw – Phase diagrams / 74.62.-c – Transition temperature variations
© EDP Sciences, 1996
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