论文标题
在Yttrium铁石榴石中旋转转移的参数泵
Spin-transfer-assisted parametric pumping of magnons in yttrium iron garnet
论文作者
论文摘要
参数泵送和自旋转移扭矩的组合是一种强大的方法，可以对薄膜铁磁体中的磁激发进行高级控制。激发参数（例如抽水功率和外部场强度）会影响单个磁通模式的不稳定性。从理论上讲，我们探讨了参数泵送和自旋转移扭矩的同时影响这些磁性不稳定性在薄膜的铁磁铁中。在Landau-Lifshitz-Gilbert框架内，我们通过抽水，自旋转移扭矩和两者的组合对Yttrium Iron Garnet中的磁弹性进行微磁模拟。我们发现，与实验结果，自旋转移扭矩调整参数不稳定性阈值的大小和方向一致。
The combination of parametric pumping and spin-transfer torque is a powerful approach that enables high-level control over magnetic excitations in thin-film ferromagnets. The excitation parameters, such as pumping power and external field strength, affect the instabilities of individual magnon modes. We theoretically explore how the simultaneous effects of parametric pumping and spin transfer torque influence these magnetic instabilities in a thin-film ferromagnet. Within the Landau-Lifshitz-Gilbert framework, we perform micromagnetic simulations of magnon excitations in yttrium iron garnet by pumping, spin transfer torque, and a combination of the two. We find that consistent with experimental results, the magnitude and direction of the spin-transfer torque tune the parametric instability thresholds.
