,Photon-magnon interaction process: a mechanism of resonance linewidths of ferromagnet

• 作 者: Li Liang-Sheng(李粮生) Shi Qing-Fan(史庆藩)
• 机 构: Department of Physics, Beijing Institute of Technology, Beijing 100081, China
• 出 处: 中国物理（英文版）
• 发表日期: 2005年1期
• 关键词: magnon unitary transformation linewidth

We consider the relaxation processes of parametric excitation of magnons in a microwave resonator. Using the approach of unitary transformation, we calculate the effective amplitude of three-boson terms of Hamiltonian, especially for photon-magnon interaction which is expected to contribute to the resonance linewidth of ferromagnets.