Vortex lines in a cubic magnetic nanodot: structure and dynamics
Institut des NanoSciences de Paris (INSP), Sorbonne Universit´e, CNRS-UMR 7588, 75005 Paris, France
2 MPQ, UMR CNRS 7162, Universit´e Paris Diderot, Universit´e de Paris, 75013 Paris France
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Published online: 15 October 2020
Langevin simulations of cubic magnetic nanodots were performed using the Landau-Lifshitz equation with exchange and dipolar interactions. Vortices tend to organize as lines: we establish the structure and dynamics thereof for a large range of the dipolar versus exchange ratio d. These lines tend to be bent and twisted. For large values of the dipolar interaction, a complex network of vortex lines arises. Dynamics evidences low frequency collective gyrotropic motions of vortex lines which maintain their distance during motion.
© The Authors, published by EDP Sciences, 2020
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