Magnetically ordered materials belong to systems with broad spectra of collective magnetic oscillations, spin waves, and systems with the highest degree of nonlinearity. We consider the possibility of studying spin waves using high-frequency harmonics, the possibility of parametric excitation of high-frequency collective magnetic oscillations using alternating magnetic fields of the lower frequency. As a model system allowing us to show proof of the principle, we use a system of magnetoelastic waves (MEWs) of high-temperature antiferromagnet with easy-plane anisotropy. The modulation method is used when an additional RF magnetic field was applied to the sample, which yielded satellites at the multiple of the pump field frequency microwave signal that passed the sample in a helix resonator when the parametric pump threshold was exceeded. We observed the process of parametric excitation of MEWs up to 64 harmonics of the pump field at a pump power up to 30 dBm. Our research is of interest for magnetic materials of nano sizes.

中文翻译：

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使用低频交变磁场研究高频磁弹性波

磁有序材料属于具有宽谱集体磁振荡、自旋波和具有最高非线性度的系统。我们考虑使用高频谐波研究自旋波的可能性，使用低频交变磁场参数激励高频集体磁振荡的可能性。作为允许我们证明原理的模型系统，我们使用具有易平面各向异性的高温反铁磁体的磁弹性波 (MEW) 系统。当对样品施加额外的 RF 磁场时使用调制方法，当超过参数泵浦阈值时，会产生泵场频率微波信号倍数的卫星，通过螺旋谐振器中的样品。我们观察了在高达 30 dBm 的泵浦功率下，高达 64 个泵浦场谐波的 MEW 参数激励过程。我们的研究对纳米尺寸的磁性材料很感兴趣。