Saravanan M
Department of Physics, Saveetha School of Engineering, Saveetha University, Chennai-602 105, Tamilnadu, India.
Phys Rev E Stat Nonlin Soft Matter Phys. 2015 Jul;92(1):012923. doi: 10.1103/PhysRevE.92.012923. Epub 2015 Jul 31.
The propagation of an electromagnetic wave in a uniaxial ferromagnetic nanowire under the spin transfer torque effect is widely investigated in the soliton frame. The magnetization dynamics of the ferromagnetic nanowire is governed by the Landau-Lifshitz-Gilbert (LLG) equation coupled to the Maxwell equation for the electromagnetic wave propagation. A nonuniform multiscale analysis is invoked for the coupled LLG-Maxwell equations and obtains the extended derivative nonlinear Schrödinger (DNLS) equation for the magnetization and external magnetic field. The effect of electric current is explored by constructing multisoliton solutions to the extended DNLS equation and the possibility of the soliton collision is exploited using the Hirota bilinearization procedure.
在孤子框架下，人们广泛研究了自旋转移力矩效应下单轴铁磁纳米线中电磁波的传播。铁磁纳米线的磁化动力学由与电磁波传播的麦克斯韦方程耦合的朗道 - 里夫希茨 - 吉尔伯特（LLG）方程所支配。对耦合的LLG - 麦克斯韦方程进行了非均匀多尺度分析，并得到了关于磁化强度和外磁场的扩展导数非线性薛定谔（DNLS）方程。通过构建扩展DNLS方程的多孤子解来探究电流的影响，并利用广田双线性化方法研究了孤子碰撞的可能性。
