Terahertz magnetic field induced coherent spin precession in YFeO3

Authors

Runze Zhou, Shanghai University
Zuanming Jin, Shanghai University
Gaofang Li, Shanghai University
Guohong Ma, Shanghai University
Zhenxiang Cheng, University of WollongongFollow
Xiaolin Wang, University of WollongongFollow

RIS ID

53011

Publication Details

Zhou, R., Jin, Z., Li, G., Ma, G., Cheng, Z. & Wang, X. (2012). Terahertz magnetic field induced coherent spin precession in YFeO3. Applied Physics Letters, 100 (6), 061102-1-061102-4.

Abstract

We present the magnetic dipole transition at 0.299 THz excited by magnetic component of terahertz electromagnetic pulse in an antiferromagnetic YFeO3 crystal. The impulsive magnetic field of the terahertz pulse tilts the macroscopic magnetization, causing deviation from the equilibrium position, which is manifested by a sharp absorption at the frequency of the quasiferromagnetic mode of the crystal. The rotating coherent macroscopic magnetization radiates elliptically polarized emission at the frequency of the quasiferromagnetic resonance due to the dichroic absorption in the crystal.