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

Journal Article · Mon Jul 14 04:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4890475· OSTI ID:22311089

Mukai, Y. ^[1]; Yamamoto, T. ^[2]; Kageyama, H. ^[3]

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1. Department of Physics, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502 (Japan)
2. Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510 (Japan)
3. Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Sakyo-ku, Kyoto 606-8501 (Japan)

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.

• OSTI ID: 22311089
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 2 Vol. 105; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

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