飞秒尺度下的惯性磁化强度动力学

Inertial magnetization dynamics on femtosecond scale

在亚皮秒到飞秒时间尺度下,铁磁体中磁化强度的动力学中要考虑惯性效应,它可以用惯性朗道-利夫希茨-吉尔伯特(inertial Landau-Lifshitz-Gilbert)方程来描述.本文主要介绍了超快铁磁共振、磁矩翻转和惯性自旋动力学在理论和实验上的一些发展,这些研究结果将有助于更好地理解超快退磁和翻转的基本机制,加深对磁惯性微观机制的理解,揭示未来的实验和理论研究的发展趋势.

Inertia effect should be considered in ferromagnet magnetization dynamics on a sub picosecond-to-femtosecond-time scale.The inertia effect can be described by the inertial Landau-Lifshitz-Gilbert equation.This paper mainly introduces some theoretical and experimental developments of ultrafast ferromagnetic resonance,magnetization reversal and inertial spin dynamics.These results will be helpful in better understanding the basic mechanism of ultrafast demagnetization and magnetization reversal,and deepen the understanding of the microscopic mechanism of magnetic inertia.In the end,the development trend of future experimental and theoretical research are also presented.