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Title Power loss for a periodically driven ferromagnetic nanoparticle in a viscous fluid: The finite anisotropy aspects
Authors Liutyi, Taras Volodymyrovych  
Lyutyy, Taras Volodymyrovych
Hryshko, Oleksandr Mykolaiovych
Ковнер, А.А.
Keywords Ferrofluid
Finite anisotropy
Spherical motion
Damping precession
Landau-Lifshitz-Gilbert equation
Type Article
Date of Issue 2018
URI http://essuir.sumdu.edu.ua/handle/123456789/70790
Publisher Elsevier
License
Citation Lyutyy, T.V. Power loss for a periodically driven ferromagnetic nanoparticle in a viscous fluid: The finite anisotropy aspects [Текст] / T.V. Lyutyy, O.M. Hryshko, A.A. Kovner // Journal of Magnetism and Magnetic Materials, 2018. - Vol. 446. - P. 87-94.
Abstract The joint magnetic and mechanical motion of a ferromagnetic nanoparticle in a viscous fluid is considered within the dynamical approach. The equation based on the total momentum conservation law is used for the description of the mechanical rotation, while the modified Landau-Lifshitz-Gilbert equation is utilized for the description of the internal magnetic dynamics. The exact expressions for the particles trajectories and the power loss are obtained in the linear approximation. The comparison with the results of other widespread approaches, such as the model of fixed particle and the model of frozen magnetic moment, is performed. It is established that in the small oscillations mode the damping precession of the nanopartile magnetic moment is the main channel of energy dissipation, but the motion of the nanoparticle easy axis can significantly influence the value of the resulting power loss.
Appears in Collections: Наукові видання (ЕлІТ)

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