B. A. Ivanov, G. G. Avanesyan, A. V. Khvalkovskiy, N. E. Kulagin, C. È. Zaspel, K. A. Zvezdin, “Non-Newtonian dynamics of the fast motion of a magnetic vortex”, Pis'ma v Zh. Èksper. Teoret. Fiz., 2010, Volume 91, Issue 4,Pages <nobr>190

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CONDENSED MATTER

Non-Newtonian dynamics of the fast motion of a magnetic vortex

B. A. Ivanov^ab, G. G. Avanesyan^c, A. V. Khvalkovskiy^c, N. E. Kulagin^d, C. È. Zaspel^e, K. A. Zvezdin^c

^a National Taras Shevchenko University of Kyiv
^b Institute of Magnetism, National Academy of Sciences of Ukraine
^c General Physics Institute named after A. M. Prokhorov, Russian Academy of Sciences
^d State University of Management
^e Department of Environmental Sciences, University of Montana-Western, Dillon MT 59725, USA

Abstract: The dynamics of a magnetic vortex in a thin magnetically soft ferromagnetic disc with a submicron diameter has been analyzed. Under the action of field pulses with a duration of the order of 10–100 ps, the vortex undergoes a complex motion. The analysis of the results of a micromagnetic simulation indicates that this motion is non-Newtonian. It can be described by an equation containing the third time derivative of the displacement of the vortex core.

Received: 11.01.2010