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https://doi.org/10.1038/srep13881
Title: | Giant moving vortex mass in thick magnetic nanodots | Authors: | Guslienko K.Y. Kakazei G.N. Ding J. Liu X.M. Adeyeye A.O. |
Issue Date: | 2015 | Publisher: | Nature Publishing Group | Citation: | Guslienko K.Y., Kakazei G.N., Ding J., Liu X.M., Adeyeye A.O. (2015). Giant moving vortex mass in thick magnetic nanodots. Scientific Reports 5 : 13881. ScholarBank@NUS Repository. https://doi.org/10.1038/srep13881 | Abstract: | Magnetic vortex is one of the simplest topologically non-trivial textures in condensed matter physics. It is the ground state of submicron magnetic elements (dots) of different shapes: cylindrical, square etc. So far, the vast majority of the vortex dynamics studies were focused on thin dots with thickness 5-50 nm and only uniform across the thickness vortex excitation modes were observed. Here we explore the fundamental vortex mode in relatively thick (50-100 nm) dots using broadband ferromagnetic resonance and show that dimensionality increase leads to qualitatively new excitation spectra. We demonstrate that the fundamental mode frequency cannot be explained without introducing a giant vortex mass, which is a result of the vortex distortion due to interaction with spin waves. The vortex mass depends on the system geometry and is non-local because of important role of the dipolar interaction. The mass is rather small for thin dots. However, its importance increases drastically with the dot thickness increasing. | Source Title: | Scientific Reports | URI: | https://scholarbank.nus.edu.sg/handle/10635/175486 | ISSN: | 20452322 | DOI: | 10.1038/srep13881 |
Appears in Collections: | Staff Publications Elements |
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