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Glassy vortex dynamics induced by a random array of magnetic particles above a superconductor

Young Sun1, M B Salamon, K Garnier

  • 1Department of Physics and Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.

Physical Review Letters
|April 20, 2004
PubMed
Summary

Magnetic relaxation in a niobium (Nb) film with permalloy particles shows logarithmic time dependence after field cooling. This glassy behavior, including aging and memory effects, suggests pinning by nanoparticle variations in vortex cores.

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