中国物理B ›› 2005, Vol. 14 ›› Issue (1): 110-114.doi: 10.1088/1009-1963/14/1/020

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

李粮生, 史庆藩   

  1. Department of Physics, Beijing Institute of Technology, Beijing,100081, China
  • 收稿日期:2004-06-21 修回日期:2004-09-13 出版日期:2005-01-20 发布日期:2005-01-20
  • 基金资助:
    Project supported by the Foundation of State Education Commission of China for Returned Chinese Scholars (Grant NoLQ2000-2

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

Li Liang-Sheng (李粮生), Shi Qing-Fan (史庆藩)   

  1. Department of Physics, Beijing Institute of Technology, Beijing 100081, China
  • Received:2004-06-21 Revised:2004-09-13 Online:2005-01-20 Published:2005-01-20
  • Supported by:
    Project supported by the Foundation of State Education Commission of China for Returned Chinese Scholars (Grant NoLQ2000-2

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摘要： 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.

关键词: magnon, unitary transformation, linewidth

Abstract: 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.

Key words: magnon, unitary transformation, linewidth

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