Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/101699
Title: Narrow autoresonant magnetization structures in finite-length ferromagnetic nanoparticles
Authors: Shagalov, A. G.
Friedland, L.
Issue Date: 2019
Publisher: American Physical Society
Citation: Shagalov A. G. Narrow autoresonant magnetization structures in finite-length ferromagnetic nanoparticles / A. G. Shagalov, L. Friedland. — DOI 10.1103/PhysRevE.100.032208 // Physical Review E. — 2019. — Vol. 100. — Iss. 3. — 032208.
Abstract: The autoresonant approach to excitation and control of large-amplitude uniformly precessing magnetization structures in finite-length easy axis ferromagnetic nanoparticles is suggested and analyzed within the Landau-Lifshitz-Gilbert model. These structures are excited by using a spatially uniform, oscillating, chirped frequency magnetic field, while the localization is imposed via boundary conditions. The excitation requires the amplitude of the driving oscillations to exceed a threshold. The dissipation effect on the threshold is also discussed. The autoresonant driving effectively compensates the effect of dissipation but lowers the maximum amplitude of the excited structures. Fully nonlinear localized autoresonant solutions are illustrated in simulations and described via an analog of a quasiparticle in an effective potential. The precession frequency of these solutions is continuously locked to that of the drive, while the spatial magnetization profile approaches the soliton limit when the length of the nanoparticle and the amplitude of the excited solution increase. © 2019 American Physical Society.
Keywords: FERROMAGNETIC MATERIALS
FERROMAGNETISM
MULTILAYERS
NANOPARTICLES
DISSIPATION EFFECTS
EFFECTIVE POTENTIALS
FERROMAGNETIC NANOPARTICLES
LANDAU-LIFSHITZ-GILBERT
MAGNETIZATION PROFILE
MAXIMUM AMPLITUDE
PRECESSION FREQUENCY
QUASI PARTICLES
MAGNETIZATION
URI: http://hdl.handle.net/10995/101699
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85072674009
PURE ID: 10771020
5c29c690-2b9d-41b7-acd2-e0a64298209c
ISSN: 24700045
DOI: 10.1103/PhysRevE.100.032208
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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