Microwave loss-factor of BaxSr1−xTiO3 as a function of temperature, biasing field, barium concentration, and frequency

A correct and verifiable model of the dielectric loss factor of BaxSr1−xTiO3 as a function of temperature, biasing field, barium concentration, and frequency has been developed in frequency range 0.1–100 GHz. Contributions to the loss factor of fundamental, quasi-Debye, acoustic, and low frequency relaxation mechanisms have been modeled. The specified frequency dependence of the loss factor has been taken into account. The fitting parameters of the model provide a good agreement between experimental and simulated data.