We study experimentally the critical depinning current I(c) versus applied magnetic field B in Nb thin films which contain 2D arrays of circular antidots placed on the nodes of quasiperiodic (QP) fivefold Penrose lattices. Close to the transition temperature T(c) we observe matching of the vortex lattice with the QP pinning array, confirming essential features in the I(c)(B) patterns as predicted by Misko et al. [Phys. Rev. Lett. 95, 177007 (2005)]. We find a significant enhancement in I(c)(B) for QP pinning arrays in comparison to I(c) in samples with randomly distributed antidots or no antidots.
Commensurability effects in superconducting Nb films with quasiperiodic pinning arrays.
M. Kemmler,C. Gürlich,A. Sterck,H. Pöhler,M. Neuhaus,Michael Siegel,R. Kleiner,D. Koelle
Published 2006 in Physical Review Letters
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- Publication year
2006
- Venue
Physical Review Letters
- Publication date
2006-05-23
- Fields of study
Medicine, Physics
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Semantic Scholar, PubMed
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