Yegiyan, S. R., L. N. Alyabyeva, V. I. Torgashev, D. A. Vinnik, S. A. Gudkova, A. S. Prokhorov, M. Dressel, and B. P. Gorshunov. "Terahertz-infrared spectroscopy of single crystalline m-type hexaferrite BaTixFe12-xO19." In Journal of Physics: Conference Series, vol. 1389, no. 1, p. 012038. IOP Publishing, 2019.
Abstract
We have studied polarization-dependent broad-band dielectric response of singlecrystalline Ti-substituted barium hexaferrites BaTixFe12-xO19, x=0.64., 0.75, 1.1, in the
frequency range from 10 to 8000 cm-1
and at temperatures from 5 to 300 K. In addition to a
rich set of phonon resonances located at frequencies from 90 to 800 cm-1 we observed an
unusual low-energy response (terahertz region, 10-100 cm-1
) stemming from two different
effects: relaxational process and second order spin-orbit coupling in Fe2+ ground state, that may
set up new prospects for doped hexaferrites in terahertz technologies.
for full paper see https://iopscience.iop.org/article/10.1088/1742-6596/1389/1/012038/pdf
The measurements of transmission spectra at frequencies from 10 to 100 cm-1 where
performed with the help of time-domain spectrometer TeraView TPS Spectra 3000 with spectral
resolution 1.2 cm-1
.
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