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中国物理学会期刊

铁磁纳米线中磁化强度的磁怪波

CSTR: 32037.14.aps.69.20191352

Rogue wave solution in ferromagnetic nanowires

CSTR: 32037.14.aps.69.20191352
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  • 本文介绍了铁磁纳米线中磁化强度的一些新激发态, 包括各向同性铁磁的Akhmediev呼吸子、Kuznetsov-Ma孤子和怪波、自旋极化电流驱动下各向异性铁磁纳米线中的怪波动力学. 在各向同性情况下, 展示了形如四片花瓣的磁孤子的空间周期过程和自旋波背景的局域化过程; 在极限情况下, 得到了磁怪波解并阐明了其形成机制. 在各向异性情况下, 发现怪波的产生主要源于中心的能量积累和快速弥散; 此外, 怪波还具有不稳定性, 它和自旋波背景间的能量与磁振子的交换可以通过自旋极化电流来调控.

     

    In this paper, we introduce some new excited states of magnetization in ferromagnetic nanowires, including Akhmediev breathers, Kuznetsov-Ma soliton and rogue wave in isotropic ferromagnetic nanowires, and rogue wave in anisotropic ferromagnetic nanowires driven by spin-polarized current. The isotropic case demonstrates a spatial periodic process of a magnetic soliton forming the petal with four pieces and a localized process of the spin-wave background. In a limit case, we get rogue waves and clarify its formation mechanism. In the case of anisotropy, it is found that the generation of rogue waves mainly comes from the accumulation of energy and rapid dispersion in the center. In addition, rogue waves are unstable, the spin-polarized current can control the exchange rate of magnons between the envelope soliton and the background. These results can be useful for the exploration of nonlinear excitation in Bosonic and fermionic ferromagnet.

     

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