Volume 110, Number 3, May 2015
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||14 May 2015|
Clustering of vortex matter in superconductor-ferromagnet superlattices
1 Bordeaux University, LOMA UMR-CNRS 5798 - F-33405 Talence Cedex, France
2 Institute for Physics of Microstructures, Russian Academy of Sciences 603950 Nizhny Novgorod, GSP-105, Russia
3 Lobachevsky State University of Nizhny Novgorod - 23 Prospekt Gagarina, 603950, Nizhny Novgorod, Russia
Received: 4 March 2015
Accepted: 21 April 2015
Metamaterials combining superconducting (S) and ferromagnetic (F) compounds permit to attend new functionalities and reveal unusual counterintuitive effects. Here we show that SF superlattices may display a very special electrodynamics due to the nonlocal polarization of the magnetic subsystem, making the intervortex interaction attractive at some distances. In such superlattices the vortex matter can form an intermediate state with alternating vortex and Meissner phases. Tuning the parameters of the F and S subsystems one can engineer the phase diagram of the vortex matter. We provide concrete recommendations for the proper choice of compounds for these SF hybrid structures.
PACS: 74.25.Uv – Vortex phases (includes vortex lattices, vortex liquids, and vortex glasses) / 74.25.Dw – Superconductivity phase diagrams / 74.20.De – Phenomenological theories (two-fluid, Ginzburg-Landau, etc.)
© EPLA, 2015
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