Magnetic pinning of flux lattice in superconducting- nanomagnet hybrids



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Pérez de Lara, David and Castaño, F. J. and Ng, B. G. and Körner, H. S. and Dumas, R. K. and González Herrera, Elvira María and Liu, Kai and Ross,, C. A. and Schuller, Ivan K. and Vicent López, José Luis (2011) Magnetic pinning of flux lattice in superconducting- nanomagnet hybrids. Applied physics letters, 99 (18). ISSN 0003-6951

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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.

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©2011 American Institute of Physics.
Work supported by Spanish MCINN Grant No. FIS2008- 06249, Consolider CSD2007-00010, CM Grant No. S2009/ MAT-1726, and Santander-UCM Grant No. GR35/10-A- 910571. Research at UCSD was funded by the US-NSF and at UC-Davis by US NSF (DMR-1008791). CAR gratefully acknowledges support from the Singapore-MIT Alliance and the assistance of Moyukh Chatterjee in modeling. We thank Y. Rosen for a critical reading of the manuscript.

Uncontrolled Keywords:Vortex
Subjects:Sciences > Physics > Materials
Sciences > Physics > Solid state physics
ID Code:43099
Deposited On:15 Jun 2017 17:33
Last Modified:16 Jun 2017 07:35

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