Abstract
Based on the Landau-Lifshitz-Gilbert(LLG)equation,the precession relaxation of magnetization is studied when the external field H is parallel to the uniaxial anisotropic field Hk.The evolution of three-component magnetization is solved analytically under the condition of H=nHk(n=3,1 and 0).It is found that with an increase of H or a decrease of the initial polar angle of magnetization,the relaxation time decreases and the angular frequency of magnetization increases.For comparison,the analytical solution for Hk=0 is also given.When the magnetization becomes stable,the angular frequency is proportional to the total effective field acting on the magnetization.The analytical solutions are not only conducive to the understanding of the precession relaxation of magnetization,but also can be used as a standard model to test the numerical calculation of LLG equation.
基金项目
国家重点研发计划(2021YFB3501300)
国家自然科学基金(91963201)
国家自然科学基金(12174163)
高等学校学科创新引智计划(111计划)(B20063)
维普
万方数据