Eigenfrequencies of vortex state excitations in magnetic submicron-size disks. Page: 1 of 13
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Eigenfrequencies of vortex state excitations in magnetic submicron-size disks
K. Yu. Guslienko 1' *, B. A. Ivanov 2, V. Novosad 3, 4, Y. Otani 3, 5, H. Shima 3, and K. Fukamichi 3
1 School of Physics, Korea Institute for Advanced Study, Seoul 130-012, South Korea
2 Institute of Magnetism, National Academy of Sciences of Ukraine, Kiev 03142, Ukraine
3 Department of Materials Science, Graduate School of Engineering, Tohoku University,
Sendai 980-8579, Japan
Materials Science Division, Argonne National Laboratory, Argonne, IL 60439, USA
5 JST, Japan Science & Technology Corporation, CREST, Kawaguchi 332-0012, Japan
We have studied theoretically and numerically dynamic properties of the vortex magnetic state in
soft submicron ferromagnetic dots with variable thickness and diameter. To describe the vortex
translation mode eigenfrequencies we applied the equation of motion for the vortex collective
coordinates. We calculated the vortex restoring force with explicit account of magnetostatic
interaction on the bases of the "rigid" vortex and two-vortices "side charges free" models. The
latter model well explains the results of our micromagnetic numerical calculations. The translation
mode eigenfrequency is inversely proportional to the vortex static initial susceptibility and lies in
GHz range for submicron in-plane dot sizes.
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Guslienko, K. Y.; Ivanov, B. A.; Novosad, V.; Otani, Y.; Shima, H. & Fukamichi, K. Eigenfrequencies of vortex state excitations in magnetic submicron-size disks., article, December 19, 2001; Illinois. (https://digital.library.unt.edu/ark:/67531/metadc723175/m1/1/: accessed March 19, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.