Nonlinear magnetization dynamics of antiferromagnetic spin resonance induced by intense terahertz magnetic field

• 廣理, 英基

• 田中, 耕一郎

• Yamamoto, T

• Kageyama, H

• Tanaka, K

抄録

We report on the nonlinear magnetization dynamics of a HoFeO3 crystal induced by a strong terahertz magnetic field resonantly enhanced with a split ring resonator and measured with magneto-optical Kerr effect microscopy. The terahertz magnetic field induces a large change (∼40%) in the spontaneous magnetization. The frequency of the antiferromagnetic resonance decreases in proportion to the square of the magnetization change. A modified Landau-Lifshitz-Gilbert equation with a phenomenological nonlinear damping term quantitatively reproduced the nonlinear dynamics.

収録刊行物

• New Journal of Physics

  New Journal of Physics 18 2016-01-21

  IOP Publishing

キーワード

• terahertz
• magnet
• nonlinear optics

詳細情報

• CRID: 1050282810814936832
• NII論文ID: 120005841425
• ISSN: 13672630
• HANDLE: 2433/216564
• 本文言語コード: en
• 資料種別: journal article
• データソース種別:
  • IRDB
  • CiNii Articles
  • KAKEN