Terahertz-infrared spectroscopy of Ti4+-doped M-type barium hexaferrite
作者： Liudmila Alyabyeva , Samvel Yegiyan , Victor Torgashev , Anatoly S. Prokhorov , Denis Vinnik
DOI: 10.1016/J.JALLCOM.2019.153398
关键词:
摘要: Abstract We report on the first detailed investigations of terahertz-infrared dielectric response potential multiferroic single crystalline Ti-doped M-type barium hexagonal ferrite, BaFe12-xTixO19, with concentrations dopant above (x = 1.15) and below (x = 0.62) critical concentration that corresponds to changes charge compensation mechanism. Employing terahertz time-domain spectroscopy Fourier-transform infrared spectroscopy, we performed measurements spectra complex permittivity e*(ν) = e′(ν)+ie"(ν) at frequencies ν = 2-8000 cm−1 (0.06–240 THz) in temperature interval T = 10–300 K. The effect aliovalent cation substitution low-energy hexaferrite is analyzed discussed. A rich set polarization- temperature-dependent excitations observed their origin assigned electronic transition within ground state 5E four-fold coordinated divalent iron, relaxational dynamics domains, phonon resonances.
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