The Dynamics Of Magnetization In Ferromagnetic Nanowires With Dzyaloshinskii-Moriya Interaction

Recently,there has been strong interest in the research of DM interaction which plays a crucial role for magnetization dynamics.Although the effect of DM interaction on the domain wall motion has been studied extensively,the properties of dynamic soliton has not been explored in ferromagnetic nanowires under the joint action of spin-polarized current and DM,This is our purpose in this paper.Firstly,the effect of DM interaction on the magnetization dynamics is introduced briefly,and the concept of magnetic domain,domain wall and soliton are summarized.Secondly,the motion equation of magnetic moment is mainly described.Also,the method for solving the modified nonlinear Schr?dinger equation is discussed in detail.At last,This paper investigates the field and spin-polarized current driven DM solitons in anisotropic ferromagnetic nanowires.The external field and DM interaction change the formation region of soliton solution and the corresponding phase diagram is given for different types of soliton solutions.The DM interaction affects the internal structure distortion of solitons which determines the soliton energy.Also,This paper has obtained the critical value of DM interaction for soliton formation.The roles of DM interaction affecting the soliton energy are completely different for the cases of soliton type I and type II in ferromagnetic nanowires.