Free Induction Decay of Ferromagnetic Resonance Observed by Time Domain THz Spectroscopy in Nano-Ferromagnet ε-Ga_xFe_(2-x)O_3

摘要

Radiation of circularly polarized sub-THz wave due to spin precession was observed at room temperature. Nearly perfect conversion of the linear to circular polarized wave was realized around the natural resonances at 102 GHz. ε-type Ga_xFe_(2-x)O_3 are very prospective for magneto-optic devices.