Zhang, J.Bialek, MarcinMagrez, ArnaudYu, H.Ansermet, Jean-Philippe2020-12-222020-12-222020-12-222020-11-2810.1016/j.jmmm.2020.167562https://infoscience.epfl.ch/handle/20.500.14299/174234Temperature dependence of the antiferromagnetic resonance spectrum in a thulium orthoferrite (TmFeO3) poly-crystalline sample was studied by transmission spectroscopy in the frequency range of 0.1–0.75 THz and temperature range of 300–670 K, up to its Néel temperature. We observed quasi-ferromagnetic resonance and the quasi-antiferromagnetic resonance modes. The temperature dependence of the resonance frequencies, linewidths, and amplitudes were extracted. The resonance spectrum of TmFeO3 near its Néel temperature was directly observed and a drastic drop in resonance frequency for both modes was observed.text::journal::journal article::research article