Abstract
We report on spectroscopic investigation of the influence of crystal structure on dielectric response in lead substituted M-type barium hexaferrite (Bal-xPb x Fe12019) single crystals. Broad-band spectra of complex dielectric permittivity have been measured in the frequency range from $\mathbf{10}\mathbf{cm}^{-1}$ to 8000 cm−1and at temperatures from 10 K to 300 K. Low-energy (terahertz) dielectric response and infrared phonon spectra are studied as dependent on lead content, $\mathbf{x(Pb) =0.1;0.6;0.8}$ .
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