Resonant THz excitation of Ce3+ crystal-field levels in paramagnetic CeF3 produces long-lived helicity-odd magnetization whose spectral sign reversal matches resonant inverse-Faraday theory.
FEL-1 provides wavelength-tunable radiation in the spectral range 25 -120 μm with an experimentally adjustable bandwidth of 0.35 -5%
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A crystal-field route to THz-driven magnetization
Resonant THz excitation of Ce3+ crystal-field levels in paramagnetic CeF3 produces long-lived helicity-odd magnetization whose spectral sign reversal matches resonant inverse-Faraday theory.