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Sun Y, Salamon MB, Garnier K, et al. Glassy vortex dynamics induced by a random array of magnetic particles above a superconductor. Phys Rev Lett. 2004;92(9):097002doi: 10.1103/PhysRevLett.92.097002.
Sun, Y., Salamon, M. B., Garnier, K., & Averback, R. S. (2004). Glassy vortex dynamics induced by a random array of magnetic particles above a superconductor. Physical review letters, 92(9), 097002. https://doi.org/10.1103/PhysRevLett.92.097002
Sun, Young, et al. "Glassy vortex dynamics induced by a random array of magnetic particles above a superconductor." Physical review letters vol. 92,9 (2004): 097002. doi: https://doi.org/10.1103/PhysRevLett.92.097002
Sun Y, Salamon MB, Garnier K, Averback RS. Glassy vortex dynamics induced by a random array of magnetic particles above a superconductor. Phys Rev Lett. 2004 Mar 05;92(9):097002. doi: 10.1103/PhysRevLett.92.097002. Epub 2004 Mar 04. PMID: 15089501.
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Phys Rev Lett. 2004 Mar 05;92(9):097002. doi: 10.1103/PhysRevLett.92.097002. Epub 2004 Mar 04.

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

Physical review letters

Young Sun, M B Salamon, K Garnier, R S Averback

Affiliations

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

PMID: 15089501 DOI: 10.1103/PhysRevLett.92.097002

Abstract

The magnetic relaxation of a Nb film covered with a random array of permalloy particles has been studied using various procedures. When the sample undergoes a field-cooled process, the magnetic relaxation becomes logarithmic in time. The relaxation rate is nearly temperature independent at low temperature and characteristic glassy dynamics-aging and memory effects-are observed. These results are interpreted as the consequence of pinning by the statistical variation of the number of nanoparticles within the area of a vortex core.

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