Magnetic pinning of flux lattice in superconducting-nanomagnet hybrids

D. Perez De Lara, F. J. Castaño, B. G. Ng, H. S. Körner, R. K. Dumas, E. M. Gonzalez, Kai Liu, C. A. Ross, Ivan K. Schuller, J. L. Vicent*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Strong superconducting pinning effects are observed from magnetic landscapes produced by arrays of circular rings with varying magnetic remanent states. The collective and the background pinning of superconducting Nb films is strongly enhanced by the stray magnetic field produced by an array of circular Ni rings magnetized to form onion (bidomain) states. On the other hand, when the same rings are magnetized into vortex (flux-closed) states, or are randomly magnetized, the superconducting pinning is much smaller. The greatest pinning is produced when the superconducting vortex lattice motion is along a direction in which there is a strong magnetic field variation.

Original languageEnglish
Article number182509
JournalApplied Physics Letters
Volume99
Issue number18
DOIs
StatePublished - 31 Oct 2011
Externally publishedYes

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