Abstract
Superconducting Pb(x)/Au(25 nm) bilayers (x = 50, 100 nm) patterned with antidot lattices exhibit various matching field anomalies depending on experimental conditions. Magnetization peaks at applied fields H = n[20 Oe] (n = integer) resemble superconducting wire network data; cusps are also observed, consistent with predictions of "giant" vortices in low-kappa films. Sharp "staircase" anomalies spaced by 1-3 Oe are observed in AC magnetization, possibly a result of depinning of intermediate state domains, or macroscopic quantum tunneling between reproducible states of different quantized flux.
Original language | English |
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Pages (from-to) | 739-743 |
Number of pages | 5 |
Journal | Physica C: Superconductivity and its Applications |
Volume | 470 |
Issue number | 19 |
DOIs | |
State | Published - Oct 1 2010 |
Keywords
- Intermediate state
- Macroscopic quantum tunneling
- Proximity effects
- Superconducting wire networks
- Vortex phases
- Vortex pinning
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering