Abstract—The “pump-probe” scheme considers oscillations of magnetization in a normally magnetized plate with magnetoelastic properties, which occur under the action of an elastic pulse excited by a powerful pulsed laser. The time evolution of magnetic oscillations excited by an elastic pulse is studied, and the corresponding precession portraits are constructed. For the case where the resonant frequencies of magnetic and elastic oscillations coincide and the relaxation times of both are close, three characteristic regimes are noted in which magnetization oscillations are nonstationary, corresponding to small, medium, and high amplitudes of the exciting pulse. The features of the observed phenomena are interpreted based on the impact nature of the excited elastic oscillations.

摘要—“泵浦-探针”方案考虑了在具有磁致弹性特性的正常磁化板上的磁化振荡，这种振荡是在强脉冲激光激发的弹性脉冲的作用下发生的。研究了弹性脉冲激发的磁振荡的时间演化，并构建了相应的进动图。对于磁振荡和弹性振荡的谐振频率重合并且两者的弛豫时间接近的情况，注意到磁化振荡是非平稳的三个特征区域，对应于激励脉冲的小、中和高幅度。基于激发的弹性振荡的影响性质解释观察到的现象的特征。