Journal
JOURNAL OF APPLIED PHYSICS
Volume 110, Issue 11, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3662923
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Funding
- National Research Foundation of Korea (NRF)
- Ministry of Education, Science and Technology [20110000441]
- National Research Foundation of Korea [2006-0050688] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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We found from analytical derivations and micromagnetic numerical simulations that there exist two distinct normal modes in apparently complex vortex gyrotropic motions in two dipolar-coupled magnetic nanodisks. The normal modes have characteristic higher and lower single angular eigenfrequencies with their own elliptical orbits elongated along the x (bonding axis) and y axes, respectively. The superposition of the two normal modes results in coupled vortex gyrations, which depend on the relative vortex-state configuration in a pair of dipolar-coupled disks. This normal-mode representation is a simple means of understanding the observed complex vortex gyrations in two or more dipolar-interacting disks of various vortex-state configurations. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3662923]
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