Primitive perovskite unit cell volume in (Ref. 13) and (Refs. 14 and 26) as a function of the Bi content.
IR reflectivity spectra of the ceramics: experimental data (open symbols) and fit (solid lines).
Imaginary part of the dielectric function calculated from IR reflectivity data on the system.
Average weighted sum of the TO phonon dampings as a function of Bi content in .
Relative permittivity (, top panel) and dielectric loss tangent (, bottom panel) for as a function of : measured at a microwave range (◼), radio frequencies (△), and extrapolated from IR data (∗). The inset shows the compositional variation of estimated from the IR dielectric function.
Three dimensional maps of the topography (top) and relative permittivity (bottom) for the ceramics with . Changing contrast from dark to bright corresponds to increasing the permittivity value.
Low-temperature dielectric response of the ceramics at the range of (increasing frequency is denoted by arrows).
Compositional variation of the peak temperature measured over in .
Vogel-Fulcher plots for the relaxation in LMT-BMT using Eq. (3).
Temperature dependences of the dielectric permittivity for the LMT-BMT ceramics (the straight lines represent linear fits). Right panel: the temperature coefficient of capacitance estimated at as a function of Bi content in (Ref. 13).
Dielectric permittivity of the ceramics at the range of as a function of temperature (Refs. 14, 15, and 26).
The microwave dielectric properties of the solid solutions based on LMT.
Relative permittivity of the ceramics measured by EMP and conventional microwave resonant cavity method at a gigahertz range.
Parameters of the fit of the data on to Eq. (3): freezing temperature , characteristic frequency , relaxation time , and activation energy .
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