Terahertz (THz) transmission spectra have been measured as function of temperature and magnetic field on single crystals of Cu3Bi(SeO3)2O2Br. In the time-domain THz spectra without magnetic field, two resonance absorptions are observed below the magnetic ordering temperature T_N~27.4 K. The corresponding resonance frequencies increase with decreasing temperature and reach energies of 1.28 and 1.23 meV at 3.5 K. Multi-frequency electron spin resonance transmission spectra as a function of applied magnetic field show the field dependence of four magnetic resonance modes, which can be modeled as a ferromagnetic resonance including demagnetization and anisotropy effects.
@article{arxiv.1210.1343,
title = {THz spectroscopy in the pseudo-Kagome system Cu3Bi(SeO3)2O2Br},
author = {Zhe Wang and M. Schmidt and Y. Goncharov and V. Tsurkan and H. -A. Krug von Nidda and A. Loidl and J. Deisenhofer},
journal= {arXiv preprint arXiv:1210.1343},
year = {2012}
}
Comments
5 pages, 3 figures. All comments are welcome and appreciated