| Issue |
Europhys. Lett.
Volume 60, Number 2, October 2002
|
|
|---|---|---|
| Page(s) | 295 - 301 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2002-00350-5 | |
| Published online | 01 October 2002 | |
Increase of the critical current at the liquid-helium lambda point in superconducting perforated multilayers
1
Dipartimento di Fisica “E. R. Caianiello” and INFM Università degli Studi di Salerno - Baronissi (Salerno), I-84081, Italy
2
State University of Informatics and Radio Electronics P.Brovka street 6, Minsk 220013, Belarus
3
Dipartimento di Fisica, Università degli Studi di Cagliari Cagliari, I-09042, Italy
4
IESS-CNR - Via Cineto Romano 42, Roma, I-00100, Italy
Received:
28
February
2002
Accepted:
26
July
2002
Pinning properties of 
multilayers with regular
array of antidots have been studied at different temperatures in
perpendicular magnetic field. The presence of antidots causes a
sudden increase (jump) of the critical current at the
liquid-helium lambda point (
). The jump value is a
function of magnetic field and sample anisotropy. The
hypothesis of liquid helium wetting the antidots below 2.18,
and then inducing a larger pinning efficiency, is put forward.
PACS: 74.60.Ge – Flux pinning, flux creep, and flux-line lattice dynamics / 74.80.Dm – Superconducting layer structures: superlattices, heterojunctions, and multilayers
© EDP Sciences, 2002
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