Coherently controlled spin precession in canted antiferromagnetic YFeO₃using terahertz magnetic field

Abstract

We investigate the details of the precessional motion of the magnetic moment in canted antiferromagnetic YFeO3, which is excited by a linearly polarized terahertz (THz) pulse at room temperature. By tuning the spectral component of the input THz pulse around the quasi-ferromagnetic mode located near 0.3 THz, we have experimentally clarified the resonance effect in the THz control of the spin state. We were able to confirm this result from the simulation based on the Landau–Lifshitz–Gilbert equation with the two sub-lattice model for the canted antiferromagnet. Finally, we discuss a crossover from a linear to a nonlinear magnetic response to the input THz pulse during the THz-induced precessional switching of the magnetization.

Field-driven dynamics and time-resolved measurement of Dzyaloshinskii-Moriya torque in canted antiferromagnet YFeO3

“…5(c). The two anisotropy energies are deduced through the two resonant frequency formulas, where ω Sigma  = 0.3 THz 15, 40 and ω Gamma  = 0.52 THz and found to be and . All parameters are in good agreement with reference 43 .…”

Terahertz Electrodynamics in Transition Metal Oxides

“…[131,[198][199][200][201][202][203][204][205][206][207][208][209][210][211][212] Figure 23 shows the THz power absorption spectra across the spin-reorientation transition in Dy 0.7 Er 0.3 FeO 3 single crystals by Suemoto et al [207] A quasi-ferromagnetic mode (F-mode at 0.25 THz) corresponding to precession of macroscopic magnetization was excited by the THz magnetic component at high temperature. The antiferromagnetic phase in RFeO 3 has three symmetry constrained magnetic configurations Γ 1 , Γ 2 , and Γ 4 for Fe 3+ -Fe 3+ coupling.…”

Terahertz Emission Functionality of High‐Temperature Superconductors and Similar Complex Systems

“…[110][111][112][113][114][115][116][117][118][119][120][121][122][123][124][125] THz emission from spinpolarized currents emphasizing spin-dependent transport has become a contemporary topic of research. Such phases are useful in spintronics devices for the readout and writing of magnetic data.…”