Phys. Rev. Lett. 101, 097203 (2008) [4 pages]Controlling Double Vortex States in Low-Dimensional Dipolar SystemsReceived 16 May 2008; revised 11 July 2008; published 26 August 2008 The reversal process of the chirality of each opposite vortex belonging to a double vortex state in ferromagnetic hysterons, via the application of in-plane magnetic fields, is reported. Simulations reveal that such a process involves the formation of four intermediate states, including original ones. Hysteresis loops can occur only in a counterclockwise fashion because of one of these intermediate states. Double vortex states can also be controlled by electric fields in ferroelectric nanostructures of different shapes, but with some key differences with respect to the ferromagnetic case. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.101.097203
DOI:
10.1103/PhysRevLett.101.097203
PACS:
75.10.−b, 75.60.Ch, 77.80.Bh, 77.80.Dj
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