Eigenmodes of two-dimensional conservative droplet soliton
Eigenmodes of two-dimensional conservative droplet soliton
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DOI：
10.1016/j.jmmm.2017.04.093
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发表时间：
2017-10-01
影响因子：
2.7
通讯作者：
Melkov, G. A.
中科院分区：
文献类型：
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作者：
Slobodianiuk, D. V.;Prokopenko, O. V.;Melkov, G. A.
在垂直磁各向异性铁磁体中，液滴孤子是一种强非线性动力学结构。对于这种结构的实验观察，利用纳米接触自旋扭矩振荡器（NC-STO），其中自旋极化电流作为增益源来抵消磁阻尼。我们分析了这种液滴激发的本征模在一个最简单的情况下保守的液滴孤子，当吉尔伯特阻尼磁膜和能量增益由于自旋极化电流可以忽略不计。作为这种分析的结果，保守液滴的本征模态频率。保守液滴本征模的主要特征之一是模态的方位角退化和模态频率在有限区域内的局部化。(C)2017爱思唯尔B. V.保留所有权利。
Droplet solitons are strongly nonlinear, dynamic structures in ferromagnets with perpendicular magnetic anisotropy. For experimental observation of such structures a nanocontact spin torque oscillator (NC-STO) where spin polarized currents act as a gain source to counteract magnetic damping is utilized. We analyze eigenmode of this droplet excitations in a simplest case of conservative droplet solitons, when both Gilbert damping in magnetic films and energy gain due to spin-polarized current can be neglected. As a result of such analysis eigenmode frequencies of conservative droplet are obtained. Among main features of conservative droplet eigenmode is azimuthal degeneration of mods and localization of mode frequencies in a finite region. (C) 2017 Elsevier B.V. All rights reserved.