Thermally tunable terahertz magnetic responses of TbFeO₃ ceramic

Terahertz (THz) radiation produces complex and intriguing interactions with many of the magnetically ordered materials. We introduced a THz time-domain spectroscopy with a temperature control attachment to investigate thermally tunable terahertz magnetic responses of TbFeO₃. Ferromagnetic (FM) resonances and antiferromagnetic (AFM) resonances were excited simultaneously at T = 3–290 K. The performance of temperature effect on resonances was assessed by their transmittance, resonant frequency shifts and a defined quality factor (Q-factor, Q = ν₀/Δν). Transmittance, defined Q-factor and frequency shifts were introduced to assess the thermally tunable performances of terahertz magnetic responses. Overall increased transmittance, increased Q-factor and blue shifts were observed as temperature cools. This will be beneficial to the THz spectroscopic application in controlling responses of various materials.