Abstract
The field dependent transport properties of superconducting niobium films, which are modulated by a regular array of non-magnetic and magnetic normal-metal inclusions (dots), have been investigated. Strong peaks in the critical current are seen for fields at which the vortex density in the super-conductor is some rational or sub-rational multiple of the dot density. This commensurate peak effect is enhanced for the magnetic dot arrays when the dots are magnetized in a direction parallel to the applied magnetic field and suppressed when they are anti-aligned. Qualitative information on the strength of this dot-vortex interaction is inferred from the commensurate peaks present and missing for different regular lattices.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 37-73 |
| Number of pages | 37 |
| Journal | Journal of Low Temperature Physics |
| Volume | 122 |
| Issue number | 1-2 |
| DOIs | |
| State | Published - Dec 1 2001 |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Materials Science(all)
- Condensed Matter Physics