Study on dielectric loss of Ba(Mg_1/3Ta_2/3)O₃ system in the range of microwave to millimeter wave frequency

Abstract

Temperature dependence of dielectric loss of the Ba(Mg_1/3Ta_2/3)O₃(BMT). dielectric loss was decreased with temperature decreasing up to 200K and showed increasing having a peak at 40K. It was inferred that this temperature dependence was due to both 2 phonon difference process and local polarization of the BMT. The local polarization had the relaxation at the MW range because this loss increasing did not appear at millimeter wave frequency.