中国物理B ›› 2025, Vol. 34 ›› Issue (6): 68502-068502.doi: 10.1088/1674-1056/add67c

所属专题: SPECIAL TOPIC — Advanced magnonics

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Control of the magnonic excitation under the joint mechanism of magnetostrictive effect and magnetocrystalline anisotropy

Saisai Yu(鱼赛赛), Junbo Liu(刘竣菠), and Hao Xiong(熊豪)†   

  1. School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
  • 收稿日期:2025-04-01 修回日期:2025-04-30 接受日期:2025-05-09 出版日期:2025-05-16 发布日期:2025-06-11
  • 通讯作者: Hao Xiong E-mail:haoxiong1217@gmail.com
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 12022507 and 11774113).

Control of the magnonic excitation under the joint mechanism of magnetostrictive effect and magnetocrystalline anisotropy

Saisai Yu(鱼赛赛), Junbo Liu(刘竣菠), and Hao Xiong(熊豪)†   

  1. School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
  • Received:2025-04-01 Revised:2025-04-30 Accepted:2025-05-09 Online:2025-05-16 Published:2025-06-11
  • Contact: Hao Xiong E-mail:haoxiong1217@gmail.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 12022507 and 11774113).

摘要: Magnetostrictive effects and magnetocrystalline anisotropy are fundamental physical properties governing magnon dynamics in magnetic systems. Recent evidence shows that strain-mediated magnetostrictive coupling provides an effective pathway for modulating magnonic excitation through quantum interference. Nevertheless, the microscopic origins of magnetocrystalline anisotropy in manipulating magnon excitation pathways, particularly regarding magnonic Kerr nonlinearity and crystal direction constraints, require further investigation. In this study, we construct a dual-frequency driven magnomechanical model based on yttrium iron garnet (YIG) spheres. By introducing a Hamiltonian with the magnonic Kerr nonlinear term, we combine the Heisenberg-Langevin equations and the mean field approximation to analytically solve for the driving efficiency $\eta$, and we base our analysis on experimental parameters to evaluate the impacts of the magnonic Kerr coefficient ($K$), driving field ($B_1$) and YIG size. The results show that the magnetocrystalline anisotropy induces a MHz-scale frequency shift, splitting the transmission spectrum from a Lorentzian line shape into asymmetric Fano resonance double peaks. The orientation of the external magnetic field (aligned with the [100] or [110] crystallographic axis) allows precise control over the sign of the magnonic Kerr coefficient $K$, thereby enabling a reversal in the direction of the frequency shift. A strong driving field $B_1$ not only enables controllable switching of the state but also adjusts the switching bandwidth. Furthermore, we show the transition of the dynamical response mechanism of the excitation efficiency spectrum with varying YIG sphere sizes. The study shows the dynamic control mechanism of the magnetocrystalline anisotropy on magnon switching and provides a theoretical foundation for size optimization and nonlinear energy manipulation in spintronic device design.

关键词: magnetostrictive effect, Kerr effect, optomechanically induced transparency

Abstract: Magnetostrictive effects and magnetocrystalline anisotropy are fundamental physical properties governing magnon dynamics in magnetic systems. Recent evidence shows that strain-mediated magnetostrictive coupling provides an effective pathway for modulating magnonic excitation through quantum interference. Nevertheless, the microscopic origins of magnetocrystalline anisotropy in manipulating magnon excitation pathways, particularly regarding magnonic Kerr nonlinearity and crystal direction constraints, require further investigation. In this study, we construct a dual-frequency driven magnomechanical model based on yttrium iron garnet (YIG) spheres. By introducing a Hamiltonian with the magnonic Kerr nonlinear term, we combine the Heisenberg-Langevin equations and the mean field approximation to analytically solve for the driving efficiency $\eta$, and we base our analysis on experimental parameters to evaluate the impacts of the magnonic Kerr coefficient ($K$), driving field ($B_1$) and YIG size. The results show that the magnetocrystalline anisotropy induces a MHz-scale frequency shift, splitting the transmission spectrum from a Lorentzian line shape into asymmetric Fano resonance double peaks. The orientation of the external magnetic field (aligned with the [100] or [110] crystallographic axis) allows precise control over the sign of the magnonic Kerr coefficient $K$, thereby enabling a reversal in the direction of the frequency shift. A strong driving field $B_1$ not only enables controllable switching of the state but also adjusts the switching bandwidth. Furthermore, we show the transition of the dynamical response mechanism of the excitation efficiency spectrum with varying YIG sphere sizes. The study shows the dynamic control mechanism of the magnetocrystalline anisotropy on magnon switching and provides a theoretical foundation for size optimization and nonlinear energy manipulation in spintronic device design.

Key words: magnetostrictive effect, Kerr effect, optomechanically induced transparency

中图分类号:  (Magnetostrictive, magnetoacoustic, and magnetostatic devices)

  • 85.70.Ec
42.65.Hw (Phase conjugation; photorefractive and Kerr effects) 42.50.Gy (Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)