Open AccessОсобенности локализации нелинейных спиновых волн в слоистой ферромагнитетике, обусловленные магнитной анизотропией слоев
Author(s) -
С.Е. Савотченко
Publication year - 2019
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2019.04.47415.327
Subject(s) - condensed matter physics , nonlinear system , anisotropy , ferromagnetism , spin wave , magnetization , magnetic anisotropy , perturbation (astronomy) , materials science , physics , magnetic field , quantum mechanics
A trilayer structure model has been investigated, in which uniaxial ferromagnetic layers and thin-film interfaces between them are characterized by the magnetic anisotropy. The magnetization perturbation induced in this structure is described by the nonlinear Schrödinger equation with a nonlinear potential, which simulates the interfaces between ferromagnetic layers. It is shown that, in this structure, two types of nonlinear spin waves can propagate along the layers, which are induced by the nonlinearity of the interfaces caused by their magnetic anisotropy. The frequencies of such localized stationary states of spin waves have been obtained in the explicit analytical form. The conditions for the existence of these states, depending on the characteristics of the layers and interfaces between them, have been established.