Observation of ferromagnetic resonance in the time domain
Observation of ferromagnetic resonance in the time domain
复制标题
时域铁磁共振观测
DOI：
10.1063/1.370414
复制
发表时间：
1999
影响因子：
3.2
通讯作者：
Jing Wu
中科院分区：
文献类型：
--
作者：
R. Hicken;Jing Wu
Optical pump–probe spectroscopy has been used to observe damped ferromagnetic resonance (FMR) oscillations in thin film Fe samples. The FMR was pumped by magnetic field pulses generated by an optically triggered photoconductive switch, and probed by means of time resolved measurements of the magneto-optical Kerr rotation. The photoconductive switch structure consisted of a parallel wire transmission line, of 125 μm track width and separation, defined on a semi-insulating GaAs substrate. The biased transmission line was optically gated at one end so that a current pulse propagated along the transmission line to where the sample had been overlaid. The magnetic field associated with the current pulse is spatially nonuniform. By focusing the probe beam on the sample at different points above the transmission line the effect of the orientation of the pump field has been studied. The gyroscopic motion of the magnetization has been modeled by solving the Landau–Lifshitz–Gilbert equation and the magneto-optical r...
