论文标题
抗铁磁共振的营养
Nutation in antiferromagnetic resonance
论文作者
论文摘要
比较铁磁，抗铁磁和铁磁系统之间的惯性自旋动力学的效果。使用分析理论和计算机模拟的惯性Landau--Lifshitz-吉尔伯特方程的框架内计算了对振荡外部磁场的线性响应。鉴定了进度和活动谐振峰，并证明旋转惯性降低了进动频率，而激发的寿命则得到了增强。发现进动与属性之间的相互作用是在抗铁磁铁中最突出的，在此，交换驱动的sublattice动力学的时间尺度与惯性放松时间相媲美。因此，与铁电磁共振相比，抗铁磁共振技术应更适合于超快时间尺度上的固有惯性旋转动力学。
The effect of inertial spin dynamics is compared between ferromagnetic, antiferromagnetic and ferrimagnetic systems. The linear response to an oscillating external magnetic field is calculated within the framework of the inertial Landau--Lifshitz--Gilbert equation using analytical theory and computer simulations. Precession and nutation resonance peaks are identified, and it is demonstrated that the precession frequencies are reduced by the spin inertia, while the lifetime of the excitations is enhanced. The interplay between precession and nutation is found to be the most prominent in antiferromagnets, where the timescale of the exchange-driven sublattice dynamics is comparable to inertial relaxation times. Consequently, antiferromagnetic resonance techniques should be better suited for the search for intrinsical inertial spin dynamics on ultrafast timescales than ferromagnetic resonance.
