Magnetization dynamics of the ferrimagnet CoGd near the compensation of magnetization and angular momentum
Magnetization dynamics of the ferrimagnet CoGd near the compensation of magnetization and angular momentum
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DOI：
10.1103/physrevb.74.134404
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发表时间：
2006-10-01
影响因子：
3.7
通讯作者：
Scheinfein, M. R.
中科院分区：
文献类型：
--
作者：
Binder, M.;Weber, A.;Scheinfein, M. R.
研究了亚铁磁CoGd合金在磁化和角动量补偿点附近的磁化动力学随合金成分和温度的变化。与标准平均场处理的总磁化强度的动态，我们观察到的角动量补偿点附近的进动频率和有效阻尼参数的增加。我们证明了从频域方法，如铁磁共振和时间分辨激光泵浦探测测量提取的磁化动力学的一致性。
Magnetization dynamics in alloys of ferrimagnetic CoGd have been studied in the vicinity of the magnetization and angular momentum compensation point as a function of alloy composition and temperature. In agreement with standard mean-field treatments of the dynamics of the total magnetization we observe an increase of the precessional frequency and the effective damping parameter near the angular momentum compensation point. We demonstrate the consistency of the magnetization dynamics extracted from frequency domain methods such as ferromagnetic resonance and time resolved laser pump-probe measurements.