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Title: Antiferromagnetic resonance excitation by terahertz magnetic field resonantly enhanced with split ring resonator

Excitation of antiferromagnetic resonance (AFMR) in a HoFeO{sub 3} crystal combined with a split ring resonator (SRR) is studied using terahertz (THz) electromagnetic pulses. The magnetic field in the vicinity of the SRR is induced by the incident THz electric field component and excites spin oscillations that correspond to the AFMR, which are directly probed by the Faraday rotation of the polarization of a near-infrared probe pulse. The good agreement of the temperature-dependent magnetization dynamics with the calculation using the two-lattice Landau-Lifshitz-Gilbert equation confirms that the AFMR is excited by the THz magnetic field, which is enhanced at the SRR resonance frequency by a factor of 20 compared to the incident magnetic field.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [2] ;  [3] ;  [1] ;  [5] ;  [3]
  1. Department of Physics, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502 (Japan)
  2. Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Sakyo-ku, Kyoto 606-8501 (Japan)
  3. (Japan)
  4. Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510 (Japan)
  5. (WPI-iCeMS), Kyoto University, Sakyo-ku, Kyoto 606-8501 (Japan)
Publication Date:
OSTI Identifier:
22311089
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 2; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ANTIFERROMAGNETISM; COMPUTERIZED SIMULATION; CRYSTALS; ELECTRIC FIELDS; ELECTROMAGNETIC PULSES; EQUATIONS; EXCITATION; FARADAY EFFECT; FERRITES; HOLMIUM COMPOUNDS; MAGNETIC FIELDS; MAGNETIZATION; OSCILLATIONS; POLARIZATION; RESONANCE; RESONATORS; SPIN; TEMPERATURE DEPENDENCE