Magnetization states of canted antiferromagnetic YFeO3investigated by terahertz time-domain spectroscopy

We investigate magnetization states of a canted antiferromagneticYFeO3 by using terahertz (THz) time-domain spectroscopy under a variationof an external magneticfield. As a quasi-ferromagnetic mode near 0.3 THz is excited by themagnetic fieldof the THz pulse, a precession of the magnetic moment and...

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Bibliographic Details
Published inJournal of applied physics Vol. 118; no. 23
Main Authors Kim, T H, Kang, C, C-S, Kee, J-H, Lee, Gruenberg, P, Tokunaga, Y, Lee, J S
Format Journal Article
LanguageEnglish
Published Melville American Institute of Physics 21.12.2015
Subjects
Antiferromagnetism
Applied physics
Ferromagnetism
Filing
Magnetic fields
Magnetic induction
Magnetic moments
Magnetism
Magnetization
Magnetization curves
Spectroscopy
Spectrum analysis
Terahertz frequencies
Time domain analysis
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Summary:We investigate magnetization states of a canted antiferromagneticYFeO3 by using terahertz (THz) time-domain spectroscopy under a variationof an external magneticfield. As a quasi-ferromagnetic mode near 0.3 THz is excited by themagnetic fieldof the THz pulse, a precession of the magnetic moment and its induction decay radiate the THzwave. Sinceoppositely aligned magneticdomains emit the circularly/elliptically polarized THz waves with opposite helicities,a detection of specific polarization of the THz wave shows a clear hysteresis behavior in goodagreement with a magnetization curve obtained as a function of the applied magnetic field. Furthermore,time-domain measurement of excited magnetic moment can provide direct information about the magnetizationdecay dynamics.
ISSN:0021-8979
1089-7550