Higher‐Order Spin‐Wave Instability Excited by Parallel Pumping
Higher‐Order Spin‐Wave Instability Excited by Parallel Pumping
复制标题
并行泵浦激发的高阶自旋波不稳定性
DOI：
10.1063/1.1729791
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发表时间：
1963
影响因子：
3.2
通讯作者：
R. White
中科院分区：
文献类型：
--
作者：
R. Joseph;E. Schlömann;R. White
自旋波的参量激发已在理论上进行了研究，而没有使用传统的近似忽略那些项的运动方程，导致磁化的非共振分量的激发。通常被忽略的项产生更高阶的不稳定性，其中不稳定自旋波的谐振频率等于泵浦频率的一半的整数倍。如果直流磁场足够高以抑制低阶不稳定性，这些高阶不稳定性应该是可观察的。
The parametric excitation of spin waves has been investigated theoretically without using the conventionally adopted approximation of neglecting those terms in the equations of motion that lead to the excitation of nonresonant components of the magnetization. The usually neglected terms generate instabilities of higher order in which the resonant frequency of the unstable spin waves equals an integer multiple of half the pump frequency. These higher‐order instabilities should become observable if the dc magnetic field is high enough to suppress the lower‐order instabilities.